(i)

  1. Some two-point boundary value problems for second order functional differential equations (with A. Lomtatidze). Masaryk University, Brno, 2000.

  2. Two-point boundary value problems for second order functional differential equations. Mem. Differential Equations Math. Phys. 20 (2000), 1-112.

(ii)

  1. On periodic solutions of second order functional differential equations (with A. Lomtatidze). Mem. Differential Equations Math. Phys. 5 (1995), 125-126.

  2. On a two-point boundary value problem for second order functional differential equations, I (with A. Lomtatidze). Mem. Differential Equations Math. Phys. 10 (1997), 125-128.

  3. On a two-point boundary value problem for second order functional differential equations, II (with A. Lomtatidze). Mem. Differential Equations Math. Phys. 10 (1997), 150-152.

  4. On a two-point boundary value problem for second order functional differential equations. Mem. Differential Equations Math. Phys. 6 (1997), 124-126.

  5. On two-point boundary value problems for two-dimensional differential systems with singularities. Georgian Math. J. 10 (2003), No. 3, 595-602.

  6. On the unique solvability of the Dirichlet problem for a linear functional differential equation of second order. (Russian) Differentsialnye Uravneniya 40 (2004), No. 4, 477-484.

  7. On nonlinear boundary value problems for two-dimensional differential systems (with I. Kiguradze). (Russian) Differentsialnye Uravneniya 40 (2004), No. 6.

  8. On periodic solutions of two-dimensional nonautonomous differential systems (with I. Kiguradze). Nonlinear Anal. Appl. (accepted).

  9. On periodic solutions of second order functional differential equations. Italian J. Pure Appl. Math. (accepted).