Alekseev A A

Publications in Math-Net.Ru

1. On the absence of periodic solutions to a system of differential equations
   
   Izv. Vyssh. Uchebn. Zaved. Mat., 1996, no. 5,  3–7
2. On the absence of limit cycles in dynamical systems with an integrating factor of a special type
   
   Differ. Uravn., 30:6 (1994),  947–954