Comparison theorems for deviated differential equations with property A . Koplatadze, R. — 1998 Memoirs on Differential Equations and Mathematical Physics
Comparison theorems for deviated differential equations with property B . Koplatadze, R. — 1999 Memoirs on Differential Equations and Mathematical Physics
On asymptotic behaviour of solutions of linear functional differential equations. Koplatadze, R. — 1995 Memoirs on Differential Equations and Mathematical Physics
n th order neutral differential equations with properties A W and B W . Grammatikopoulos, M.K.; Koplatadze, R. — 2000 Georgian Mathematical Journal
Oscillatory behaviour of solutions of two-dimensional differential systems with deviated arguments. Koplatadze, R.; Partsvania, N. — 1999 Georgian Mathematical Journal
On the oscillation of solutions of two-dimensional linear differential systems with deviated arguments. Koplatadze, R.; Partsvania, N. — 1998 Memoirs on Differential Equations and Mathematical Physics
On the oscillation of solutions of first-order delay differential inequalities and equations. Koplatadze, R.; Kvinikadze, G. — 1994 Georgian Mathematical Journal
Criteria for oscillation of solutions of two-dimensional differential systems with deviating arguments. Koplatadze, R.; Partsvania, N. — 1995 Memoirs on Differential Equations and Mathematical Physics
On oscillation of second order linear difference equations with deviated arguments. Koplatadze, R.; Kvinikadze, G. — 1997 Memoirs on Differential Equations and Mathematical Physics
On the oscillation of solutions of first-order differential equations with retarded arguments. Grammatikopoulos, M.K.; Koplatadze, R.; Stavroulakis, I.P. — 2003 Georgian Mathematical Journal
Properties A and B of n th-order linear differential equations with deviating argument. Koplatadze, R.; Kvinikadze, G.; Stavroulakis, I.P. — 1999 Georgian Mathematical Journal