Pleshkan I I

Publications in Math-Net.Ru

1. On the isochronicity of systems of two differential equations whose right-hand sides contain common factors
   
   Differ. Uravn., 23:6 (1987),  981–993
2. Questions of the isochronism of systems with discontinuous right hand sides
   
   Differ. Uravn., 10:5 (1974),  822–837
3. On the problem of isochronism for systems with discontinuous right-hand sides
   
   Differ. Uravn., 10:4 (1974),  647–658
4. On the problem of the center for systems with discontinuous right-hand sides
   
   Differ. Uravn., 9:10 (1973),  1817–1825
5. A new method of research on the isochronism of a system of two differential equations
   
   Differ. Uravn., 5:6 (1969),  1083–1090
6. A new method of investigation on the isochronism of a system of differential equations
   
   Dokl. Akad. Nauk SSSR, 182:4 (1968),  768–771
7. Conditions for the isochronism of systems of two differential equations
   
   Differ. Uravn., 4:11 (1968),  1991–1993