Peretyagin B M

Publications in Math-Net.Ru

1. On the number of limit cycles of equation $\frac{dy}{dx}=\frac{cx+dy+P(x,y)}{ax+by+Q(x,y)}$ where $P(x,y)$ and $Q(x,y)$ are homogeneous polynomials of degree $n$
   
   Dokl. Akad. Nauk SSSR, 114:1 (1957),  29–32