• Universitexts
• Papers in Elementary Mathematics

2025

1. Convex Functions and Their Applications. A Contemporary Approach, 3rd edition. CMS Books in Mathematics vol. 23, xvii + 493 pp., Springer International Publishing AG, 2025. (In collaboration with Lars-Erik Persson)
2. Choquet Integrals and Monotone Sublinear Operators, Frontiers in Mathematics, Birkhäuser, 2025 (In collab. with Sorin G. Gal)

2024

1. Degree of convergence in operator versions of nonlinear Korovkin's theorems. Bollettino dell Unione Matematica Italiana 17 (2024), 577-587. DOI: 10.1007/s40574-023-00397-1 (In collab. with Sorin G. Gal)
2. Quantitative Korovkin Theorems for Monotone Sublinear and Strongly Translatable Operators in $L_{p}([0, 1]), 1 ≤ p ≤ ∞, Annales Polonici Mathematici 132 (2024), 137-151. DOI: 10.4064/ap230511-18-12 (In collab. with Sorin G. Gal)
3. Nonlinear operator extensions of Korovkin's theorems, Positivity 28 (2024), issue 2, article 14. DOI: 10.1007/s11117-024-01034-7 (In collab. with Sorin G. Gal)
4. Functional inequalities in the framework of Banach spaces, Results in Math. 79 (2024), article no. 275. DOI : 10.1007/s00025-024-02306-0 For a preliminary version see ArXiv May 30, 2024, arXiv:2405.20097v2 [math.FA, CA]
5. A survey of the Hornich-Hlawka inequality, Preprint ArXiv July 3, 2024 [math.CA] (In collab. with D. S. Marinescu)
6. A nonlinear Korovkin variant of the Weyl ergodic theorem, Preprint ArXiv July 3, 2024 [math.CA]

2023

1. Korovkin type theorems for the weakly nonlinear and monotone operators. Mediterranean Journal of Mathematics 20 (2023), issue 2, article 56. DOI 10.1007/s00009-023-02271-y (In collab. with Sorin G. Gal)
2. The Hornich-Hlawka. functional inequality for functions with positive differences . Preprint ArXiv 2301.08342v1 (In collab. with Suvrit Sra)
3. Functional inequalities for functions with positive differences on convex cones. Results in Math. 78 (2023), issue 6, article 217. DOI 10.1007/s00025-023-01987-3 (In collab. with Suvrit Sra)
4. Old and new on the 3-convex functions. Math. Inequal. Appl. 26 (2023), issue 4, 911-933. DOI:10.7153/mia-18-85 (In collab. with Dan-Stefan Marinescu) A preliminary version is available at https://arxiv.org/abs/2305.04353v1
5. Nonlinear operator extensions of Korovkin's theorems. Preprint ArXiv February 3, 2023. (In collab. with Sorin G. Gal)

2022

1. Nonlinear versions of Korovkin's abstract theorems, Revista de la Real Academia de Ciencias Exactas, Fisicas y Naturales RACSAM), Serie A. Matematicas 116 (2022), Issue 2, 17 pp, article no. 68. DOI 10.1007/s13398-021-01187-0 (In collab. with Sorin G. Gal)
2. Quantitative Korovkin theorems for sublinear, monotone and strongly translatable operators in $ L^{p}([0, 1]), 1\le p\le+\infty$. Preprint arXiv:2212.01262. (In collab. with Sorin G. Gal)

2021

1. Approximation of Random Functions by Random Polynomials in the Framework of Choquet's Theory of Integration, Carpathian Journal of Mathematics 37 (2021), No. 2. (In collab. with Sorin G. Gal)
2. Choquet operators associated to vector capacities, J. Math. Anal. Appl. 500 (2021), Issue 2, paper 125153. DOI: 10.1016/j.jmaa.2021.125153 (In collab. with Sorin G. Gal)
3. A new look at the Hardy-Littlewood-Polya inequality of majorization, J. Math. Anal. Appl. 501 (2021), Issue 2, paper 125211. DOI: 10.1016/j.jmaa.2021.125211
4. A note on the Choquet type operators, Aequationes Math. DOI: 10.1007/s00010-021-00803-z (In collab. with Sorin G. Gal)

2020

1. Convex functions and Fourier coefficients, Positivity 24 (2020), No. 1, 129-139. DOI: 1 0.1007/s11117-019-00670-8 (In collab. with Ionel Roventa)
2. From the Hahn-Banach extension theorem to the isotonicity of convex functions and the majorization theory, Revista de la Real Academia de Ciencias Exactas, Fisicas y Naturales. Serie A. Matematicas, 114 (2020), No. 4. DOI: 10.1007/s13398-020-00905-4 (In collab. with Octav Olteanu)
3. A Nonlinear Extension of Korovkin's Theorem, Mediterranean Journal of Mathematics 17 (2020), No. 5. DOI: 10.1007/s00009-020-01583-7 (In collab. with Sorin G. Gal)

2019

1. The Abel-Steffensen inequality in higher dimensions, Carpathian Journal of Mathematics 35 (2019), No. 1, 69-78.
2. A new look at Popoviciu s concept of convexity for functions of two variables, J. Math. Anal. Appl. 479 (2019), No. 1, 903-925. DOI: 10.1016/j.jmaa.2019.06.057 (In collab. with Sorin G. Gal)
3. Kantorovich's Mass Transport Problem for Capacities, Proceedings of the Romanian Academy Series A 20 (2019), No. 4, 337-345. (In collab. with Sorin G. Gal)

2018

1. Convex Functions and Their Applications. A Contemporary Approach, Second edition. CMS Books in Mathematics vol. 23, xvii + 415 pp., Springer International Publishing AG, 2018. ISBN-13: 978-3319783369 (In collab. with Lars-Erik Persson)

2017

1. Hardy-Littlewood-Polya theorem of majorization in the framework of generalized convexity, Carpathian Journal of Mathematics 33 (2017), No. 1, 87-95. (In collab. with Ionel Roventa)
2. The Steffensen-Popoviciu measures in the context of quasiconvex functions , J. Math. Inequal. 11 (2017), No. 2, 469--483. (In collab. with Marius Marinel Stanescu)
3. A Note on Abel's Partial Summation Formula , Aequationes Math. 91 (2017), No. 6, 1009- 1024. (In collab. with Marius Marinel Stanescu)

2016

1. A simple proof of the Jensen type inequality of Fink and Jodeit . Mediterranean Journal of Mathematics 13 (2016), 119-126. DOI: 10.1007/s00009-014-0480-4 (In collab. with Marcela Mihai)
2. The Integral Version of Popoviciu's Inequality on Real Line. Annals of the Academy of Romanian Scientists, Series on Mathematics and its Applications, 8 (2016), No. 1, 56-67. (In collab. with Gabriel Prajitura)

2015

1. A short proof of Burnside's asymptotic formula. Banach J. Math. Anal. 9 (2015) No. 2, 196-200. DOI: 10.15352/bjma/09-2-14 (In collab. with Florin Popovici)
2. Relative Convexity and Its Applications. Aequationes Math. 89 (2015), Issue 5, 1389-1400. DOI: 10.1007/s00010-014-0319-x (In collab. with Ionel Roventa)
3. Relative convexity on global NPC spaces. Math. Inequal. Appl. 18 (2015), No. 3, 1111-1119. DOI:10.7153/mia-18-85 (In collab. with Ionel Roventa)

2014

1. Real Analysis on Intervals. Springer New Delhi Heidelberg New York Dordrecht London, 2014. xi + 525 pp. (In collaboration with Alla Ditta Raza Choudary) ISBN 978-81-322-2147-0; ISBN 978-81-322-2148-7 (eBook)
2. An Approach of Majorization in Spaces with a Curved Geometry. J. Math. Anal. Appl. 411 (2014), Issue 1, 119-128. DOI: 10.1016/j.jmaa.2013.09.038 (In collab. with Ionel Roventa)
3. Some open problems concerning the convergence of positive series. Annals of the Academy of Romanian Scientists, Series on Mathematics and its Applications 6 (2014), No. 1, 85-99. (In collab. with Gabriel Prajitura)
4. Relative Convexity and Its Applications. ArXiv preprint arXiv:1409.2772, 2014 (In collab. with Ionel Roventa)

2013

1. An extension of Chebyshev's algebraic inequality. Math. Reports 15 (65) (2013), No. 1, 91-95. (In collab. with Ionel Roventa)
2. A short proof of Stirling's formula. American Mathematical Monthly 120 (2013), No. 8, 733-736 (In collab. with Dorin Ervin Dutkay and Florin Popovici)
3. New Jensen-type inequalities. J. Math. Anal. Appl. 401 (2013), No. 1, 343 348. DOI: 10.1016/j.jmaa.2012.11.051 (In collab. with Catalin Irinel Spiridon) Available also at http://arxiv.org/abs/arXiv:1207.6877
4. The asymptotic behavior of integrable functions. Real Analysis Exchange, Vol. 38 (1), 2012/2013, 157-168. (In collab. with Florin Popovici)
5. Lagrange's Barycentric Identity From An Analytic Viewpoint. Bull. Math. Soc. Sci. Math. Roumanie, 56 (104), no. 4, 2013, 487-496. (In collab. with Holger Stephan)
6. A Note on Jensen's inequality for 2D-Convex Functions. Annals of the University of Craiova - Mathematics and Computer Science Series 40 (2013), Issue 2, 1-4. (In collab. with Khuram Ali Khan and Josip Pecaric)

2012

1. Generalized convexity and the existence of finite time blow-up solutions for an evolutionary problem. Nonlinear Analysis 75 (2012), 270 277. (In collab. with Ionel Roventa) DOI: 10.1016/j.na.2011.08.031 Available at http://arxiv.org/abs/1107.5647v1
2. The Hermite-Hadamard inequality for log-convex functions. Nonlinear Analysis 75 (2012), 662-669.
   DOI: 10.1016/j.na.2011.08.066
3. A brief account on Lagrange's identity, The Mathematical Intelligencer, 34 (2012), No. 3, 55-61. DOI: 10.1007/s00283-012-9305-0 (In collab. with Marian Gidea)
4. Strong and weak-type weighted norm inequalities for the geometric fractional maximal operator, Bulletin of the Australian Mathematical Society 86 (2012), 2015-215. (In collab. with Sorina Barza)
5. The Behavior at Infinity of an Integrable Function, Expositiones Mathematicae 30 (2012) 277 282 (In collab. with Florin Popovici) DOI: 10.1016/j.exmath.2012.03.002
6. Majorization in Spaces with a Curved Geometry. (In collab. with Ionel Roventa) Available at http://arxiv.org/abs/1204.0929
7. A note on Stirling's formula for the Gamma function. Journal of Prime Research in Mathematics 8 (2012), 1-4. (In collab. with Dorin Ervin Dutkay and Florin Popovici)
8. A generalization of Lagrange's algebraic identity and connections with Jensen's inequality. WIAS Preprint List No. 1756 (2012) (In collab. with Holger Stephan)

2011

1. Weak solutions via bipotentials in mechanics of deformable solids, J. Math. Anal. Appl. 379 (2011), No. 1, 15-25. (In collab. with Andaluzia Cristina Matei)
2. A note on the behavior of integrable functions at infinity, J. Math. Anal. Appl. 381 (2011), Issue 2, 742-747. (In collab. with Florin Popovici)
3. Young Gauss Meets Dynamical Systems, The Mathematical Intelligencer 33 (2011), No. 1, 2-4. DOI: 10.1007/s00283-010-9178-z
4. A new look at the Lyapunov inequality, Annals of the Academy of Romanian Scientists, Series on Mathematics and its Applications 3 (2011), 207-217.
5. The Monotone Convergence Theorem for the Riemann Integral, Annals of the University of Craiova - Mathematics and Computer Science Series XXXVIII (2011), Issue 2, 55-58. (In collab. with Florin Popovici)
6. An Extension of Young's Inequality, Abstract and Applied Analysis, Volume 2011, Article ID 162049, 18 pages. DOI:10.1155/2011/162049. See also http://arxiv.org/abs/arXiv:1106.5444 (In collab. with Corina-Flavia Mitroi)
7. On a result of G. Bennett, Bull. Math. Soc. Sci. Math. Roumanie 54 (102), no. 3, 261-267, 2011.
8. Some open problems concerning the convergence of positive series. arXiv:1201.5156 (In collab. with Gabriel Prajitura)

2010

1. The equivalence of Chebyshev's inequality with the Hermite-Hadamard inequality. Math. Reports, 12 (62), No. 2, 2010, pp. 145-156. (In collab. with Josip Pe ari )
2. Popoviciu's inequality for functions of several variables. J. Math. Anal. Appl., 365 (2010), Issue 1, 399 409. DOI:10.1016/j.jmaa.2009.10.069m (In collab. with Mihail Bencze and Florin Popovici)
3. Large solutions for semilinear parabolic equations involving some special classes of nonlinearities, Discrete Dynamics in Nature and Society, Volume 2010 (2010), Article ID 491023, 11 pages. DOI:10.1155/2010/491023. (In collab. with Ionel Roventa)

2009

1. An overview of absolute continuity and its applications. In vol. Inequalities and Applications (Proceedings of the Conference in Inequalities and Applications, Noszvaj (Hungary), September 2007), International Series of Numerical Mathematics, vol. 157 , pp. 201-214, Birkh user Verlag, 2009 (Editors, Catherine Bandle, Attila Gil nyi, L szl Losonczi, Zsolt P les and Michael Plum). ISBN 978-3-7643-8772-3.
2. An ergodic characterization of uniformly exponentially stable evolution families. Bull. Math. Soc. Sci. Math. Roumanie 52 (100), no. 1, 2009, pp. 33-40. (In collab. with Constantin Buse)
3. The integral version of Popoviciu's inequality. Journal Math. Inequal. 3 (2009), no. 3, 323-328.
4. The Hermite-Hadamard inequality for convex functions on a global NPC space. J. Math. Anal. Appl. 356 (2009), no. 1, 295-301. DOI:10.1016/j.jmaa.2009.03.007
5. Fan's inequality in geodesic spaces. Appl. Math. Letters, 22 (2009), no. 10, 1529-1533. DOI:10.1016/j.aml.2009.03.020 (In collab. with Ionel Roventa)
6. The existence of a global attractor for a class of rational maps. Annals of the Academy of Romanian Scientists, Series on Mathematics and its Applications 1 (2009), no. 2, 215-227. (In collab. with Ionel Roventa)
7. Schauder fixed point theorem in spaces with global nonpositive curvature. Fixed Point Theory and Appl. vol. 2009 (2009), Article ID 906727, 8 pages. doi:10.1155/2009/906727. (In collab. with Ionel Roventa)

2008

1. A condition of uniform exponential stability for semigroups, Math. Inequal. Appl. 11 (2008), No. 3, 529-536. (In collab. with Constantin Buse)

2007

1. Fan's Inequality in the Context of M_p-Convexity. In vol. Applied Analysis and Differential Equations. Proc. ICAADE 2006, pp. 267-274, World Scientific, Singapore, 2007 (Editors, Ovidiu Carja and Ioan I. Vrabie). ISBN 978-981-270-594-5, ISSN 981-270-594-5. (In collab. with Ionel Roventa) Revised, February 12, 2009.
2. An extension of the Hermite-Hadamard inequality through subharmonic functions, Glasgow. Math. J. 49 (2007), 509-514. (In collab. with Mihai Mihailescu)
3. A Hermite-Hadamard inequality for convex-concave symmetric functions, Bull. Math. Soc. Sci. Math. Roumanie 50 (98), no. 2, 2007, pp. 149-156. (In collab. with Aurelia Florea)
4. The Krein-Milman Theorem in Global NPC Spaces, Bull. Math. Soc. Sci. Math. Roumanie 50 (98), no. 4, 2007, pp. 343-346.

2006

1. Integral inequalities for concave functions, Publ. Math. Debrecen 68 (2006), No. 1-2, 139-142. (In collab. with Sorina Barza)
2. Convex Functions and Their Applications. A Contemporary Approach, CMS Books in Mathematics vol. 23, Springer-Verlag, New York, 2006. xvi + 256 pp. ISBN 0-387-24300-3 (In collab. with Lars-Erik Persson)
3. An extension of two basic results in real analysis. In vol.: Mathematical Analysis and Applications , International Conference on Mathematical Analysis and Applications, Craiova, Romania, 23-24 September 2005. AIP Conference Proceedings, Vol. 835, pp. 48-57, American Institute of Physics, Melville, New York, 2006 (V. D. Radulescu and C. P. Niculescu, Editors). ISBN 0-7354-0328-7. ISSN 0094-243X. (In collab. with Dorin Ervin Dutkay and Florin Popovici)
4. An antiplane contact problem for viscoelastic materials with long-term memory, Math. Modeling and Analysis 11 (2006), No. 2, 213-228. (In collab. with Mircea Sofonea and Andaluzia Matei)
5. The extension of majorization inequalities within the framework of relative convexity, Journal of Inequalities in Pure and Applied Mathematics (JIPAM) 7 (2006), Issue 1, Article No. 27, 6pp. (In collab. with Florin Popovici)
6. A Refinement of Popoviciu's inequality, Bull. Math. Soc. Sci. Math. Roumanie 49 (97), 2006, No. 3, 285-290. (In collab. with Florin Popovici)
7. An invitation to convex functions theory. In vol.: Order Structures in Functional Analysis), vol. 5, pp. 1-16, Ed. Academiei, Bucharest, 2006. (R. Cristescu Editor)

2005

1. Asymptotic stability and integral inequalities for solutions of linear systems on Radon-Nikodym spaces, Math. Inequal. Appl. 8 (2005), 347-356. (In collab. with Constantin Buse)
2. A Note on Ostrowski's Theorem, J. Ineq. Appl. 2005 , Issue 5, 459-468. (In collab. with Florea Aurelia)
3. An Introduction to Mathematical Analysis, Universitaria Press, Craiova, 2005. ISBN 0-973-742-138-8.
4. Special Topics in Functional Analysis, Universitaria Press, Craiova, 2005. ISBN 0-973-742-137-X. (Romanian)

2004

1. A Note on the Denjoy-Bourbaki Theorem, Real Analysis Exchange 29 (2003/2004), No. 2, 639-646. (In collab. with Florin Popovici)
2. Old and new on the Hermite-Hadamard inequality, Real Analysis Exchange 29 (2003/2004), No. 2, 663-686. (In collab. with Lars-Erik Persson)
3. An Extension of the Mazur-Ulam Theorem. In: Global Analysis and Applied Mathematics, Intern. Workshop on Global Analysis, Ankara, Turkey, 15-17 April, 2004. AIP Conference Proceedings Vol. 729, pp. 248-256, American Institute of Physics, Melville, New York, 2004 (K. Tas, D. Krupka, O. Krupkova and D. Baleanu, Editors). ISBN 0-354-0209-4. ISSN 0094-243X. Revised, March 30, 2008.
4. Interpolating Newton's Inequalities, Bull. Math. Soc. Sci. Math. Roumanie 47 (95),2004, No. 1-2, 67-83.
5. A Two-Sided Estimate of e^x-(1+x/n)^n, Journal of Inequalities in Pure and Applied Mathematics (JIPAM) 5 (2004), Issue 3, Article 55, 4 pp. (In collab. with Andrei Vernescu)

2003

1. Non-commutative extensions of classical and multiple recurrence theorems, J. Operator Theory 50 (2003), No. 1, 3-52. (In collab. with Anton Stroh and Laszlo-Zsido)
2. Convex Functions. Basic Theory and Applications. Universitaria Press, Craiova, 2003, xiv+185 pp. ISBN 973-8043-389-9 (In collab. with Lars-Erik Persson)
3. Convexity according to means, Math. Inequal. Appl. 6 (2003), 571-579.
4. The Hardy-Landau-Littlewood inequalities with less smoothness, Journal of inequalities in pure and Applied Mathematics (JIPAM), 4 (2003), Issue 3, Article 51, 8 p. (In collab. with Constantin Buse)
5. On the Algebraic Character of Blundon's Inequalities. In Vol.: Inequality Theory and Applications Mathematics (Y. J. Cho, S. S. Dragomir and J. Kim Editors), Vol. 3, pp. 139-144, Nova Science Publishers, New York, 2003. ISBN 1-59033-891-X.

2002

1. Choquet's theory for signed measures, Math. Inequal. Appl. 5 (2002), 479-489.
2. The Hermite-Hadamard inequality for convex functions of a vector variable, Math. Inequal. Appl. 5 (2002), 619-623.
3. A generalization of a theorem of Bernard concerning the frontal sets. Proc. of the 4th International Conference on Functional Analysis and Approximation Theory, Acquafredda di Maratea (Potenza, Italy), September 22-28, 2000. In: Redinconti del Circolo Matematico di Palermo, Serie II, Suppl. 68 (2002), 699-710. (In collab. with Gavriil Paltineanu and Dan Tudor Vuza).
4. Chaotic Dynamical Systems. An Introduction. Universitaria Press, Craiova, 2002, xvi + 239 pp. ISBN 973-8043-159-9. (In collab. with Marian Gidea)
5. The Integral Calculus of Functions of Several Variables. Theory and Applications. Universitaria Press, Craiova, 2002, viii + 221 pp. ISBN 973-8043-155-5. (Romanian)
6. Analysis on Real Line. A Contemporary Approach. Second edition with corrections, Universitaria Press, Craiova 2002, x + 277 pp. ISBN 973-8043-154-4. (Romanian)
7. A note on the Ky Fan inequality, Analele Universitatii din Craiova, seria matematica-informatica XXIX (2002), 47-51. (In collab. with Florea Aurelia)

2001

1. What is chaos and why should we mind of it? In: Order Structures in Functional Analysis vol. 4 (R. Cristescu editor), pp. 103-123, Ed. Academiei Romane, Bucharest, 2001. ISBN 973-27-0820-4.
2. An extension of Chebyshev's inequality and its connection with Jensen's inequality, Journal of Inequalities and Applications 6, (2001), No. 4, 451-462.
3. A multiplicative mean value and its applications. In: Theory of Inequalities and Applications, vol. 1 (Y. J. Cho, S. S. Dragomir and J. Kim, editors), pp, 243-255, Nova Science Publishers, Huntington, New York, 2001. ISBN 1-59033-188-5.
4. Analysis on Real Line. A Contemporary Approach, Universitaria Press, Craiova 2001, x + 264 pp. ISBN 973-8043-87-7. (Romanian)
5. A note on the Hermite-Hadamard inequality, The Math. Gazette, July 2001, Note 85.42, pp. 48-50.

2000

1. Convexity according to the geometric mean, Math. Inequal. Appl. 3 (2000), No. 2, 155-167.
2. A new look at Newton's inequalities, Journal of Inequalities in Pure and Applied Mathematics (JIPAM) 1 (2000), Issue 2, Article No. 17. Corrected February 2, 2021.
3. On the Riemann-Lebesgue Lemma. In: Proceedings of the 3rd Annual Conference of Romanian Mathematical Society , Craiova, May 26-29, Vol. 1, Scientific Communications, pp. 151-156, Ed. Reprograph, Craiova, 2000. ISBN (Romanian) (In collab. with Dan Tudor Vuza)
4. Function spaces attached to elliptic operators. In: Proc. of the National Conference on Mathematical Analysis and Applications, Timisoara, December 12-13, 2000, pp. 239-250, University of West, Timisoara, 2000.

1. Converses of the Cauchy-Schwarz inequality in the C*-framework, Analele Universitatii din Craiova, seria matematica-informatica 25 (1999), 22-28.
2. Applications of Elliptic Operator Methods to C^{infinity}-Convergence Problem. Rev. Roumaine Math. Pures et Appl. 44 (1999), No. 5-6, pp. 793-798.
3. A Hilbert Space Approach of Poincare's Recurrence Theorem. Rev. Roumaine Math. Pures et Appl. 44 (1999), No. 5-6, pp. 799-805.
4. Solvability of an Elliptic System with Discontinuous Nonlinearity and L^1 -data. Comm. on Applied Nonlinear Analysis 6 (1999), No. 3, pp. 449-458. (In collab. with Nicolae Tarfulea)
5. A class of Dirichlet Boundary value problems which admit infinitely many solutions. Scientiae Mathematicae 1 (1998), No. 3, pp. 483-487. (In collab. with Nicolae Tarfulea)
6. Topological transitivity and recurrence as a source of chaos. In vol.: Functional Analysis and Economics Theory, (Y. Abramovich, Y. Avgerinos and N. C. Yannelis editors), pp. 101-108, Springer-Verlag, Berlin, 1998.
7. Birkhoff Recurrence Theorem and Combinatorial Properties of Abelian Semigroups, Rev. Roum. Math. Pures Appl. 41 (1996), 675-686. MR1647675
8. A saddle point theorem for non-smooth functionals and problems at resonance, Annales Acad. Sci. Fennicae, Series A, 21 (1996), 117-131. (In collab. with Vicentiu Radulescu) MR1375511
9. Chaos and fine observables, Analele Universitatii din Craiova, seria matematica-informatica 23 (1996), 1-8.
10. A combinatorial property of abelian semigroups, Rev. Roum. Math. Pures Appl. 40 (1995), 669-679. MR1405106
11. Facial structures from the order theoretical point of view, Math. Reports 46 (1995), 417-451. MR1682880
12. On L-M duality in real Banach spaces, Rev. Roum. Math. Pures Appl. 38 (1993), 275-279. (In collab. with Dan Tudor Vuza) MR1324281
13. Interpolation and approximation from the M-theory point of view, Rev. Roum. Math. Pures Appl. 38 (1993), 531-544. (In collab. with Gavriil Paltineanu and Dan Tudor Vuza) MR1258054
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15. Ideals associated to Boolean algebras of projections, Math. Reports 44 (1992), 435-448. MR1194869
16. The Evolution of the Notion of Ideal in Functional Analysis. In vol.: Order Structures in Functional Analysis, vol. 3 (R. Cristescu editor), pp. 65-120, Ed. Academiei, Bucharest, 1992. ISBN 973-27-0334-2. MR1194869
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18. A commutative extremal extension of the Hilbert-Schmidt theorem, Rev. Roum. Math. Pures Appl. 34 (1989), 247-261. MR1006646
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21. Weak Compactness in Banach Lattices. In vol.: Order Structures in Functional Analysis, vol. 1, (R. Cristescu editor), pp. 97-158, Ed. Academiei, Bucharest, 1986. (Romanian) MR0935013
22. Operators of type A and local absolute continuity, J. Operator Theory 13 (1985), 49-61. MR 86b:47064
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24. Factoring Weakly Compact Operators. Analele Universitatii din Craiova, Seria Matematica, Fizica-Chimie X (1982), 1-5.
25. Order sigma-continuous operators on Banach lattices. In vol.: Banach Space Theory and its Applications, Proceedings, Bucharest, 1981 (A. Pitsch, N. Popa and I. Singer editors). Lecture Notes in Math. 991 (1983), 188-201. MR0714186
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29. Elements of Banach Spaces Theory, 239 pp, Ed. Academiei, Bucharest, 1981. (In collab. with N. Popa) (Romanian) MR0616450
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