Konovalov I A

Publications in Math-Net.Ru

1. The generalized principle of central symmetry
   
   Differ. Uravn., 22:10 (1986),  1689–1693
2. On conditions for the monocyclicity of a certain system of differential equations
   
   Differ. Uravn., 12:4 (1976),  754–757
3. The limit cycles of a certain dynamical system
   
   Differ. Uravn., 10:3 (1974),  547–549
4. Certain sufficient tests for the existence of limit cycles of a certain dynamic system
   
   Differ. Uravn., 7:2 (1971),  226–231