Vinogradov N N

Publications in Math-Net.Ru

1. The existence of a periodic solution of a nonlinear system of three differential equations
   
   Differ. Uravn., 6:10 (1970),  1901
2. Certain existence theorems for a periodic solution and theorems on determining the boundary of a region of asymptotic stability of the trivial solution of a system of ordinary differential equations
   
   Differ. Uravn., 1:4 (1965),  442–448
3. Some existence theorems for a periodic solution of an autonomous system of six differential equations
   
   Differ. Uravn., 1:3 (1965),  330–334