1. On oscillatory properties of second order systems of ordinary differential equations (with A. Lomtatidze). Mem. Differential Equations Math. Phys. 5 (1995), 122-124.

  2. Criteria for oscillation of solutions of two-dimensional differential systems with deviating arguments (with R. Koplatadze). Mem. Differential Equations Math. Phys. 6 (1995), 119-120.

  3. On oscillation of solutions of second order systems of deviated differential equations. Georgian Math. J. 3 (1996), No. 6, 571-582.

  4. To the question of oscillation of solutions of two-dimensional differential systems with deviated arguments. Mem. Differential Equations Math. Phys. 10 (1997), 113-114.

  5. Oscillatory properties of solutions of two-dimensional differential systems with deviated arguments (with R. Koplatadze). (Russian) Differentsial'nye Uravneniya 33 (1997), No. 10, 1312-1320; English transl. in: Differ. Equations 33 (1997), No. 10, 1318-1326.

  6. On the oscillation of solutions of two-dimensional linear differential systems with deviated arguments (with R. Koplatadze). Mem. Differential Equations Math. Phys. 13 (1998), 148-149.

  7. On oscillatory solutions of two-dimensional differential systems with deviating arguments. Fourth Intern. Conf. on Difference Equations and Applications, Poznań, Poland, August 27-31, 1998, pp. 279-281.

  8. Oscillation and nonoscillation criteria for two-dimensional systems of first order linear ordinary differential equations (with A. Lomtatidze). Georgian Math. J. 6 (1999), No. 3, 285-298.

  9. Oscillatory behaviour of solutions of two-dimensional differential systems with deviated arguments (with R. Koplatadze). Georgian Math. J. 6 (1999), No. 4, 335-346.

  10. On nonnegative solutions of nonlinear two-point boundary value problems for two-dimensional differential systems with advanced arguments (with I. Kiguradze). E. J. Qualitative Theory of Diff. Equ., 1999, No. 5, 1-22 (http://www.math.u-szeged.hu/ejqtde/1999/199905.html).

  11. On a boundary value problem for the two-dimensional system of evolution functional differential equations. Mem. Differential Equations Math. Phys. 20 (2000), 154-158.

  12. Oscillatory properties of solutions of two-dimensional linear differential systems with deviated arguments (with R. Koplatadze). Rep. Enlarged Sess. Semin. I. Vekua Inst. Appl. Math. 15 (2000), No. 1-3, 68-70.

  13. On advanced functional differential equations with properties A and B (with I. Kiguradze and I. P. Stavroulakis). Mem. Differential Equations Math. Phys. 24 (2001), 146-150.

  14. On oscillatory solutions of nonlinear differential equations with advanced arguments (with I. Kiguradze and I. P. Stavroulakis). Mem. Differential Equations Math. Phys. 25 (2002), 156-158.

  15. On oscillatory properties of higher order advanced functional differential equations (with I. Kiguradze and I. P. Stavroulakis). (Russian) Differentsial'nye Uravneniya 38 (2002), No. 8, 1030-1041; English transl. in: Differ. Equations 38 (2002), No. 8, 1095-1107.

  16. On the Kneser problem for two-dimensional differential systems with advanced arguments (with I. Kiguradze). J. Inequal. Appl. 7 (2002), No. 4, 453-477.

  17. Asymptotic behaviour of solutions of two-dimensional linear differential systems with deviating arguments (with R. Koplatadze and I. P. Stavroulakis). Arch. Math. (Brno) 39 (2003), No. 3, 213-232.

  18. On vanishing at infinity solutions of second order differential equations (with I. Kiguradze). Mem. Differential Equations Math. Phys. 32 (2004), 129-135.

  19. On lower and upper solutions of the Kneser problem (with I. Kiguradze). Mem. Differential Equations Math. Phys. 32 (2004), 155-158.

  20. Oscillation properties of first order neutral differential equations near the critical states (with Y. Domshlak and I. P. Stavroulakis). Nonlinear Funct. Anal. & Appl. 9 (2004), No. 2, 173-184.

  21. On transitional solutions of second order nonlinear differential equations (with L. Malaguti and C. Marcelli). J. Math. Anal. Appl. (accepted).