Tkach B P

Publications in Math-Net.Ru

1. The existence of periodic solutions of nonlinear partial differential equations of neutral type
   
   Izv. Vyssh. Uchebn. Zaved. Mat., 1970, no. 8,  112–117
2. Periodic solution of systems of partial differential equations of neutral type
   
   Differ. Uravn., 5:4 (1969),  735–748
3. A partial differential equation with retarded argument
   
   Differ. Uravn., 3:10 (1967),  1796–1800