Publications

When you grow to believe that your work is very important, you are
very near to a nervous breakdown.
(Bertrand Russell)

1. Papers in Scientific Journals and Proceedings

2015 - present2010 - 20142005 - 20092000 - 20041993 - 1999
  • Agratini, O., Precup, R., Iterates of multidimensional approximation operators via Perov  theorem, CARPATHIAN JOURNAL OF MATHEMATICS, Vol. 38, 2022, No. 3, 539 -546.
    DOI: https://doi.org/10.37193/CJM.2022.03.02
  • Agratini, O., Doğru, O., Kantorovich-type operators associated with a variant of Jain operators,  STUDIA UNIVERSITATIS BABEȘ-BOLYAI MATHEMATICA, Vol. 66, No. 2, 2021, 279 – 288. DOI: 10.24193/subbmath.2021.2.04
  • Abel, U., Agratini, O., On the  Durrmeyer-type variant and generalizations of Lototsky-Bernstein operators, SYMMETRY, Vol. 13, Issue 10, Article 1841, 2021. DOI: https://doi.org/10.3390/sym13101841
  • Agratini, O., Aral, A., Approximation of some classes of functions by Landau type operators, RESULTS IN MATHEMATICS, Vol. 76, Article 12, 2021, 15 pages.
    Doi.org/10.1007/s00025-020-01319-9
  • Agratini, O., Approximation properties of a family of integral type operators, POSITIVITY, Vol. 25, Issue 1, 2021, 97 – 108.
    Doi.org/10.1007/s11117-020-00752-y
  • Agratini, O., Gal, Sorin G., On Landau-type approximation operators,  MEDITERRANEAN JOURNAL OF MATHEMATICS, Vol. 18, Issue 2, Article  64, 2021, 15 pages.
    Doi.org/10.1007/s00009-021-01712-w
  • Agratini, O., Karsli H., Modifying an approximation process using non – Newtonian calculus, STUDIA UNIV. BABEŞ-BOLYAI, MATHEMATICA, Vol. 65, 2020, No. 2, 291 – 301.
  • Agratini, O., Linear positive operators constructed by using Beta – type bases, HACETTEPE JOURNAL OF MATHEMATICS AND STATISTICS, Vol. 49, Issue 3, 2020, 1030 – 1038.
  • Agratini, O., On a class of Bernstein-type rational functions, NUMERICAL FUNCTIONAL ANALYSIS AND OPTIMIZATION, Vol. 41, Issue 4, 2020, 483 – 494.
  • Agratini, O., Shift λ – invariant operators, CONSTRUCTIVE MATHEMATICAL ANALYSIS, Vol. 2, Issue 3, 2019, 103 – 108.
  • Agratini, O., Properties of discrete non-multiplicative operators, ANALYSIS AND MATHEMATICAL PHYSICS, Vol. 9, Issue 1, 2019, 131 – 141.
  • Agratini, O., A stop over Jain operators and their generalizations, ANALELE UNIVERSITĂŢII DE VEST, TIMIŞOARA, Seria Matematică – Informatică, Vol. 56, 2018, f. 2, 28 – 42.
  • Agratini, O., From uniform to statistical convergence of binomial-type operators, In: ADVANCES IN SUMMABILITY AND APPROXIMATION THEORY, pp.169 – 179, (Eds.
    S. A. Mohiuddine, Tuncer Acar), Springer, Singapore, 2018. ISBN: 978-981-13-3076-6
  • Agratini, O., Approximation with arbitrary order by certain linear positive operators, POSITIVITY, Vol. 22, Issue 5, 2018, 1241 – 1254.
  • Abel, U., Agratini, O., Păltănea, R., A complete asymptotic expansion for the quasi- interpolants of Gauss-Weierstrass operators, MEDITERRANEAN JOURNAL OF MATHEMATICS, Vol. 15, Issue 4, 2018, Article 156, 10 pages.
  • Agratini, O., Statistical convergence applied to Korovkin-type approximation theory, WSEAS TRANSACTIONS ON MATHEMATICS, Vol. 16, 2017, 183 – 186.
  • Agratini, O., Aral, A., Deniz, E., On two classes of approximation processes of integral type, POSITIVITY, Vol. 21, Issue 3, 2017, 1189 – 1199.
  • Abel, U., Agratini, O., Asymptotic behavior of Jain operators, NUMERICAL ALGORITHMS, Vol. 71, Issue 3, 2016, 553-565.
  • Agratini, O., Gupta, V., On the uniform convergence of a q-series, CARPATHIAN JOURNAL OF MATHEMATICS, Vol. 32, 2016, No. 2, 141-146.
  • Abel, U., Agratini, O., On the variation detracting property of operators of Balázs and Szabados, ACTA MATHEMATICA HUNGARICA, Vol. 150, Issue 2, 2016, 383-395.
  • Agratini, O., Kantorovich-type operators preserving affine functions, HACETTEPE JOURNAL OF MATHEMATICS AND STATISTICS, Vol. 45, Issue 6, 2016, 1657-1663.
  • Agratini, O., Kantorovich sequences associated to general approximation processes, POSITIVITY, Vol. 19, Issue 4, 2015, 681 – 693.
  • Agratini, O., A sequence of positive linear operators associated with an approximation process, APPLIED MATHEMATICS AND COMPUTATION, Vol. 269, 2015, 23 – 28.
  • Agratini, O., Uniform approximation of some classes of linear positive operators expressed by series, APPLICABLE ANALYSIS, Vol. 94, Issue 8, 2015, 1662 – 1669.
  • Agratini, O., On a property of moduli of smoothness and K-functionals, FILOMAT, Vol. 29, Issue 7, 2015, 1425 – 1428.
  • Agratini, O., On approximation process of integral type, APPLIED MATHEMATICS AND COMPUTATIONS, Vol. 236, 2014, 195 – 201.
  • Zeng, X. – M., Gupta, V., Agratini, O., Approximation by Bézier variant of the Baskakov operators in the case 0 < α < 1, ROCKY MOUNTAIN JOURNAL OF MATHEMATICS, Vol. 44, No. 1, 2014, 317 – 327.
  • Agratini, O., Tarabie, S., Trîmbiţaş, R., Approximation of bivariate functions by truncated classes of operators, In: Proceedings of the Third International Conference on Modelling and Development of Intelligent Systems, Sibiu-Romania, October 10 – 12, 2013, pp. 11-19, Editor Dana Simian, Lucian Blaga University Press, Sibiu, 2014.
  • Agratini, O., Approximation properties of a class of linear operators, MATHEMATICAL METHODS IN THE APPLIED SCIENCES, Vol. 36, Issue 17, 2013, 2353 – 2358.
  • Agratini, O., On a double complex sequence of linear operators, NUMERICAL FUNCTIONAL ANALYSIS AND OPTIMIZATION, Vol. 34, No. 6, 2013, 605 – 612.
  • Agratini, O., Bivariate positive operators in polynomial weighted spaces, ABSTRACT AND APPLIED ANALYSIS, Vol. 2013, Article ID 850760, 8 pages, 2013
  • Agratini, O., Statistical convergence of integral operators generated by a single kernel, NONLINEAR ANALYSIS: THEORY, METHODS & APPLICATIONS, Vol. 75, 2012, 3465 – 3469.
  • Agratini, O., A-statistical convergence of a class of integral operators, APPLIED MATHEMATICS & INFORMATION SCIENCES, Vol. 6, No. 2, 2012, 325 – 328.
  • Agratini, O., Radu, C., On q – Baskakov – Mastroianni operators, ROCKY MOUNTAIN JOURNAL OF MATHEMATICS, Vol. 42, No. 3, 2012, 773 – 790.
  • Agratini, O., Nowak, G., On a generalization of Bleimann, Butzer and Hahn operators based on q-integers, MATHEMATICAL AND COMPUTER MODELLING, Vol. 53, 5-6, 2011, 699 – 706.
  • Agratini, O., Radu, C., An extension based on qR-integral for a sequence of operators, APPLIED MATHEMATICS AND COMPUTATION, Vol. 218, Issue 1, 2011, 140 – 147.
  • Agratini, O., Statistical convergence of a non-positive approximation process, CHAOS, SOLITONS & FRACTALS, Vol. 44, 2011, 977 – 981.
  • Agratini, O., On a q-analogue of Stancu operators, CENTRAL EUROPEAN JOURNAL OF MATHEMATICS, Vol. 8, 2010, No. 1, 191-198.
  • Agratini, O., Dogru, O., Weighted approximation by q-Szasz-King type operators, TAIWANESE JOURNAL OF MATHEMATICS, Vol. 14, 2010, No. 4, 195-206.
  • Agratini, O., An asymptotic formula for a class of approximation processes of King’s type, STUDIA SCIENTIARUM MATHEMATICARUM HUNGARICA, Vol. 47, No. 4, 2010, 435 – 444.
  • Agratini, O., Radu, C., Asymptotic formulae for Baskakov-Mastroianni operators based on q-integers, In: SUPLLEMENTO AI RENDICONTI DEL CIRCOLO MATEMATICO DI PALERMO, Serie II, numero 82, pp. 195-206, 2010 – Proceedings of the 6th International Conference on Functional Analysis and Approximation Theory, Acquafredda di Maratea,(Potenza-Italy), September 24-30, 2009.
  • Agratini, O., Andrica, T., Discrete approximation processes of King’s type, In: NONLINEAR ANALYSIS AND VARIATIONAL PROBLEMS, pp. 3-12, (Eds. Panos P. Pardalos, Themistocles M. Rassias, Akhtar A. Khan), Springer Optimization and its Applications, Vol. 35, Springer, 2010.
  • Agratini, O., On statistical approximation in spaces of continuous functions, POSITIVITY, Vol. 13, 2009, 4, 735 – 743.
  • Agratini, O., Tarabie, S., On some linear positive operators: statistical approximation and q-generalizations, In: Proceedings of First International Conference on Modelling and Development of Intelligent Systems, Sibiu-Romania, October 22-25, 2009, pp. 7-13, Editor Dana Simian, Lucian Blaga University Press, Sibiu, 2009.
  • Agratini, O., On the iterates of a class of summation-type linear positive operators, COMPUTERS AND MATHEMATICS WITH APPLICATIONS, Vol. 55, Issue 6, 2008, 1178 – 1180.
  • Agratini, O., On certain q-analogues of the Bernstein operators, CARPATHIAN JOURNAL OF MATHEMATICS, Vol. 24, 2008, No. 3, 281-286.
  • Agratini, O., Tarabie, S. On approximating operators preserving certain polynomials, AUTOMATION COMPUTER APPLIED MATHEMATICS, Vol.17, 2008, No.2, 191-199.
  • Agratini, O., Andrica, T., Inequalities and Approximation Theory, In: INEQUALITIES AND APPLICATIONS, Eds. Themistocles M. Rassias, Dorin Andrica, pp. 1-12, Cluj University Press, 2008.
  • Agratini, O., On the variation detracting property of a class of operators, APPLIED MATHEMATICS LETTERS, Vol. 19, 2006, Issue 11, 1261-1264.
  • Agratini, O., Linear operators that preserve some test functions, INTERNATIONAL JOURNAL OF MATHEMATICS AND MATHEMATICAL SCIENCES,Vol. 2006, Article ID 94136, pages 1-11.
  • Agratini, O., On a class of linear positive bivariate operators of King type, STUDIA UNIV. “BABEŞ-BOLYAI”, MATHEMATICA, Vol. 51, 2006, f .4, 13-22.
  • Agratini, O., On approximation of functions by positive linear operators, In: STUDII ŞI CERCETĂRI ŞTIINŢIFICE, Seria Matematică, Proceedings of International Conference of Mathematics & Informatics ICMI45, Bacău, September 18 – 20, 2006, Vol. 16 (2006) Supplement, pp. 17 – 28, Universitatea din Bacău, Facultatea de Ştiinţe.
  • Agratini, O., On the rate of convergence of some integral operators for functions of bounded variation, STUDIA SCIENTIARUM MATHEMATICARUM HUNGARICA, Vol. 42, 2, 2005, 235 – 252.
  • Agratini, O., Quantitative approximation by using scaling type functions, STUDIA UNIV. “BABEŞ-BOLYAI”, MATHEMATICA, Vol. 50, 2005, f. 2, 3-13.
  • Agratini, O., Rate of convergence of a class of Bezier type operators for functions of bounded variation, In: SUPLLEMENTO AI RENDICONTI DEL CIRCOLO MATEMATICO DI PALERMO Serie II, numero 76, pp. 177-195, 2005 -Proceedings of the 5th International Conference on Functional Analysis and Approximation Theory, Acquafredda di Maratea, (Potenza-Italy), June 16-23, 2004.
  • Agratini, O., A generalization of Durrmeyer-type polynomials and their approximation properties, In: APPLICATIONS OF FIBONACCI NUMBERS, Proceedings of the Tenth International Research Conference on Fibonacci Numbers and Their Applications, Northern Arizona University, Flagstaff, June 24-28, 2002, Vol. 9 (Ed. Fredric T. Howard), pp. 9-18, Kluwer Academic Publishers, 2004.
  • Agratini, O., Della Vecchia, Biancamaria, Mastroianni operators revisited, FACTA UNIVERSITATIS, Nis, Series: Mathematics and Informatics, Vol. 19, 2004, 53-63.
  • Agratini, O., Linear operators generated by a probability density function, In: ADVANCES IN CONSTRUCTIVE APPROXIMATION: VANDERBILT 2003, (Eds.,M. Neamtu and E. B. Saff) pp. 1-12, Proceedings of International Conference Advances in Constructive Approximation, 14-17 May, 2003, Nashville, Tennessee, Nashboro Press, TN, 2004.
  • Agratini, O., On the convergence of a truncated class of operators, BULLETIN INSTITUTE OF MATHEMATICS, ACADEMIA SINICA, TAIWAN, Vol.31, 2003, no.3, 213-223.
  • Agratini, O., Rus, I. A., Iterates of a class of discrete linear operators via contraction principle, COMMENTATIONES MATHEMATICAE UNIVERSITATIS CAROLINAE, Vol. 44, 2003, 3, 555-563.
  • Agratini, O., Rus, I. A., Iterates of some bivariate approximation process via weakly Picard operators, NONLINEAR ANALYSIS FORUM, Vol. 8, 2003, No.2, 159-168.
  • Agratini, O., Operators generated by a quasi-scaling type function, REVISTA DE LA UNION MATEMATICA ARGENTINA, Vol. 44, 2003, 2, 21-30.
  • Agratini, O., On some Bernstein type operators: iterates and generalizations, EAST JOURNAL ON APPROXIMATIONS, Vol. 9, 2003, 4, 415-426.
  • Agratini, O., On approximation properties of Balázs-Szabados operators and their Kantorovich extension, THE KOREAN JOURNAL OF COMPUTATIONAL & APPLIED MATHEMATICS, Vol. 9, 2002, No. 2, 361-372.
  • Agratini, O., Stancu modified operators revisited, REVUE D’ANALYSE NUMERIQUE ET DE THEORIE DE L’APPROXIMATION, Tome 31, no. 1, 2002, 9 – 16.
  • Agratini, O., On the rate of convergence for semigroups and processes of Feller type, ANALELE UNIVERSITĂŢII BUCUREŞTI, Matematica – Informatica, Vol. 51, 2002, No.1, 3 – 11.
  • Agratini, O., On some operators of discrete type, In: SUPLLEMENTO AI RENDICONTI DEL CIRCOLO MATEMATICO DI PALERMO, Serie II, numero 68, pp. 229-243, 2002 – Proceedings of the 4th International Conference on Functional Analysis and Approximation Theory, Acquafredda di Maratea, (Potenza-Italy), September 22-28, 2000.
  • Agratini, O., The mysterious wavelets world, In: Poceedings of the 5th Romanian-German Seminar on MATHEMATICAL ANALYSIS AND APPROXIMATION THEORY, Sibiu, June 12 – 15, 2002 Eds. A. Lupaş, H. Gonska, L. Lupaş), pp. 9-35, Burg Verlag, Sibiu, 2002.
  • Agratini, O., On some wavelet type linear operators, In: Proceedings of the INTERNATIONAL SYMPOSIUM ON NUMERICAL ANALYSIS AND APPROXIMATION THEORY, Cluj-Napoca, May 9-11, 2002, (Ed. Radu T. Trimbitas), pp. 46-53, ClujUniversity Press, 2002.
  • Agratini, O., Approximation operators – solutions and questions, In: SEMINAIRE DE LA THEORIE DE LA MEILLEURE APPROXIMATION, CONVEXITE ET OPTIMISATION, Cluj- Napoca, 22-26 mai, 2002, (Ed. E. Popoviciu), pp. 21-29, Editura SRIMA, 2002.
  • Agratini, O., Korovkin type error estimates for Meyer-König and Zeller operators, MATHEMATICAL INEQUALITIES & APPLICATIONS, Vol. 4, 2001, No. 1, 119-126.
  • Agratini, O.,An approximation process of Kantorovich type, MATHEMATICAL NOTES, Miskolc, Vol. 2, 2001, No. 1, 3-10.
  • Agratini, O., Binomial polynomials and their applications in Approximation Theory, CONFERENZE DEL SEMINARIO DI MATEMATICA DELL’ UNIVERSITA DI BARI, Vol. 281, Aracne Editrice, Roma, 2001, 1-22.
  • Agratini, O., On the rate of convergence of a positive approximation process, NIHONKAI MATHEMATICAL JOURNAL, Japan, Vol. 11, 2000, No. 1, 47-56.
  • Agratini, O., On a certain class of approximation operators,PURE MATHEMATICS AND APPLICATIONS, Vol. 11, 2000, No. 2, 119-127.
  • Agratini, O., More than a summing up about Meyer-König and Zeller operators, Proceedings of the 4th Romanian-German Seminar on APPROXIMATION THEORY AND ITS APPLICATIONS, Braşov, 3-5 July, 2000, (Eds. H. H. Gonska, D. Kacso, L. Beutel), pp. 13-25, Duisburg: Schriftenreihe des Fachbereichs der Gerhard-Mercator-Universität, SM-DU-485, 2000.
  • Agratini, O., Application of Popoviciu’s high convexity to the study of some sequences properties, In: SEMINAIRE DE LA THEORIE DE LA MEILLEURE APPROXIMATION, CONVEXITE ET OPTIMISATION, Cluj-Napoca, 26-29 Octobre, 2000, (Ed. E. Popoviciu), pp. 1-15, Editura SRIMA, 2000.
  • Agratini, O., Approximation properties of a class of linear operators, BULETINUL ACADEMIEI DE ŞTIINŢE A REPUBLICII MOLDOVA, Vol. 29, 1999, f. 1, 73-78.
  • Agratini, O., A note on a class of operators on infinite interval, DEMONSTRATIO MATHEMATICA, Vol. 32, 1999, No. 4, 779-794.
  • Agratini, O., Smoothness properties of positive summation integral operators, EAST JOURNAL ON APPROXIMATIONS, Vol. 5, 1999, 381-392.
  • Agratini, O., On a sequence of linear and positive operators, FACTA UNIVERSITATIS, Nis, Series: Mathematics and Informatics, Vol. 14, 1999, 41-48.
  • Agratini, O., Properties concerning the Baskakov-Beta operators, In: CONFERENCE ANALYSIS, FUNCTIONAL EQUATIONS, APPROXIMATION AND CONVEXITY, Proceedings of the Conference held in honour of Professor Elena Popoviciu on the occasion of her 75thf birthday, Cluj- Napoca, October 15-16, 1999 (Eds. L. Lupşa, M. Ivan), pp. 1-7, Editura Carpatica, 1999.
  • Agratini, O., Approximation properties of a generalization of Butzer and Hahn operators, MATHEMATICA PANNONICA, Vol. 9, 1998, f. 2, 165-171.
  • Agratini, O., Properties of a new class of recursively defined Baskakov-type operators, ARCHIVUM MATHEMATICUM, Tomus 34, 1998, f. 3, 353-359.
  • Agratini, O., Asymptotic formulae for recursively defined Baskakov-type operators, PUBLICATIONS DE L’INSTITUT MATHEMATIQUE, Beograd,. S., Tome 63(77), 1998, 152-162.
  • Agratini, O., Linear combinations of D. D. Stancu polynomials, REVUE D’ANALYSE NUMERIQUE ET DE THEORIE DE L’APPROXIMATION, Tome 27, no. 1, 1998, 15-22.
  • Agratini, O., An asymptotic property of integral type operators, MATHEMATICA, Tome 40(63), no. 1, 1998, 3-8.
  • Agratini, O., On a problem of A. Lupaş, GENERAL MATHEMATICS, Vol. 6, 1998, 3-11.
  • Agratini, O., On a class of linear approximating operators, MATHEMATICA BALKANICA N. S. Vol. 11, 1997, f. 3-4, 407-412.
  • Agratini, O., Construction of Baskakov-type operators by wavelets, REVUE D’ANALYSE NUMERIQUE ET DE THEORIE DE L’APPROXIMATION, Tome 26, nos. 1-2, 1997, 3-11.
  • Agratini, O., On modified Beta operators, STUDIA UNIV. “BABEŞ-BOLYAI”, MATHEMATICA, Vol. 42, 1997, f. 1, 5-9.
  • Agratini, O., A bivariate extension of the Bernstein polynomials, STUDIA UNIV. “BABEŞ-BOLYAI”, MATHEMATICA, Vol. 42, 1997, f. 2, 7-10.
  • Agratini, O., On a functional equation, STUDIA UNIV. “BABEŞ-BOLYAI”, MATHEMATICA, Vol. 42, 1997, f. 4, 1-8.
  • Agratini, O., On simultaneous approximation by Stancu-Bernstein operators, In: APPROXIMATION AND OPTIMIZATION, Proceedings of ICAOR International Conference on Approximation and Optimization (Romania), Cluj-Napoca, July 29- August 1, 1996, Vol. I (Eds. D. D. Stancu, Gh. Coman, W. W. Breckner, P. Blaga), pp. 157-162, Transilvania Press, 1997.
  • Agratini, O., Application of divided differences to the study of monotonicity of a sequence of polynomials, REVUE D’ANALYSE NUMERIQUE ET DE THEORIE DE L’APPROXIMATION, Tome 25, nos. 1-2, 1996, 3-10.
  • Agratini, O., On the monotonicity of sequence of Bernstein type operators, STUDIA UNIV. “BABEŞ-BOLYAI”, MATHEMATICA, Vol. 41, 1996, f. 2, 17-23.
  • Agratini, O., A class of Bleimann, Butzer and Hahn type operators, ANALELE UNIVERSITĂŢII DIN TIMIŞOARA, seria Matematică-Informatică, Vol. 34, 1996, f. 2, 173-180.
  • Agratini, O., Approximation theorem in Lp for a class of operators constructed by wavelets, STUDIA UNIV. “BABEŞ-BOLYAI”, MATHEMATICA, Vol. 41, 1996, f. 4, 11-16.
  • Agratini, O., An application of divided differences, AUTOMATION COMPUTER APPLIED MATHEMATICS, Vol.4, 1995, No.2, 95-99.
  • Agratini, O., On the construction of approximating linear positive operators by probabilistic methods, STUDIA UNIV. “BABEŞ-BOLYAI”, MATHEMATICA, Vol. 38, 1993, 45-50.

2. Books

      • Agratini, O., Aproximare prin operatori liniari, PRESA UNIVERSITARĂ CLUJEANĂ, 2000, pp. 354.
        ISBN: 973-595-084-X
      • Stancu, DD., Coman, Gh., Agratini, O., Trîmbiţaş, R., Analiză numerică şi teoria proximării, Vol.I, PRESA UNIVERSITARĂ CLUJEANĂ, 2001, pp.414.
        ISBN: 973-610-043-X
      • Agratini, O., Chiorean, I., Coman, Gh., Trîmbiţaş, R., Analiză numerică şi teoria aproximării, Vol. III, PRESA UNIVERSITARĂ CLUJEANĂ, 2002, pp.551.
        ISBN: 973-610-164-9
      • Agratini, O., Blaga, P., Coman, Gh., Lectures on wavelets, numerical methods and statistics, CASA CĂRŢII DE ŞTIINŢĂ, Cluj – Napoca, 2005, pp. 196.
        ISBN: 973-686-762-5
      • Agratini, O., Șerban, A. M., Ilea, V., Teme pentru perfecționarea profesorilor. Matematică aplicată, Vol. 5, CASA CĂRȚII DE ȘTIINȚĂ, 2017, pp. 326.
        ISBN: 978-606-17-1129-1

3. Editor

      • Proceedings of the International Conference on Numerical Analysis and Approximation Theory, Cluj-Napoca, Romania, July 4-8, 2006, Edited by Agratini O. and Blaga P., Babeş – Bolyai University, CASA CĂRŢII DE ŞTIINŢĂ, Cluj – Napoca, 2006, pp.418.
        ISBN: 973-686-961-X, 978-973-686-961-7

4. Books and papers in Elementary Mathematics

    • Agratini, O., Ursu, S., Miheţ, S., Matematici aplicate, auxiliar pentru pregătirea elevilor de liceu, Vol.I & II, Editura DACIA, Cluj – Napoca, 2001, pp.526.
      ISBN: 973-35-1090-4 & 973-35-1119-6
    • Agratini, O., Ursu, S., Complemente de algebră şi analiză, Editura STUDIUM Cluj-Napoca, 1998, pp. 222.
      ISBN: 973-9422-04-7
    • Agratini, O., Hudrea, M., Miheţ, S., Ursu S., Matematica între plăcere şi efort, Editura STUDIUM, Cluj-Napoca, 1996, pp. 446.
      ISBN: 973-9258-09-3
    • Agratini, O., Asupra noțiunii de convergență statistică, DIDACTICA MATHEMATICA, Vol. 32, 2014, 1-8.
    • Agratini, O., Radu, C., On some probability problems, DIDACTICA MATHEMATICA, Vol. 26, 2008, No. 1, 1-8.
    • Agratini, O., Aplicaţii practice ale ecuaţiilor diferenţiale, Lucrările Seminarului DIDACTICA MATEMATICII, Vol. 17, 2001, 5-14.
    • Agratini, O., Proprietăţile şirurilor Fibonacci şi Lucas, Lucrările Seminarului DIDACTICA MATEMATICII, Vol. 16, 2000, 3-14.
    • Agratini, O., Asupra proprietăţilor funcţiilor euleriene, Lucrările Seminarului DIDACTICA MATEMATICII, Vol. 14, 1998, 17-26.
    • Agratini, O., Probabilistic and non-probabilistic properties of the sequence {Wn}, Lucrările Seminarului DIDACTICA MATEMATICII, Vol. 12, 1996, 1-6.
    • Agratini, O., Consideration upon a contest problem, Lucrările Seminarului DIDACTICA MATEMATICII, Vol. 11, 1995, 19-22.
    • Agratini, O., Notă asupra tratării unor probleme de teoria probabilităţilor, Lucrările Seminarului DIDACTICA MATEMATICII, Vol. 8, 1992, 1-4.
    • Agratini, O., Aplicaţii ale transformărilor geometrice, Lucrările Seminarului DIDACTICA MATEMATICII, Vol. 6, 1990, 21-26.