Bulgakov Valerii Ivanovich

Publications in Math-Net.Ru

1. On a bifurcation of a non-rough focus of a third-order autonomous system
   
   Differ. Uravn., 32:12 (1996),  1703
2. The phase portrait of a third-order autonomous system
   
   Differ. Uravn., 24:10 (1988),  1821–1822
3. The existence of a knotted solution for a third order autonomous system
   
   Differ. Uravn., 13:8 (1977),  1507–1508