TY - JOUR AU - L. A. Cherkas TI - The singular cycles of the equation $\frac{dy}{dx}=\frac{P(x,y)}{xy}$, where $P(x,y)$, is a second degree polynomial JO - Differencialʹnye uravneniâ PY - 1968 SP - 2281 EP - 2285 VL - 4 IS - 12 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DE_1968_4_12_a13/ LA - ru ID - DE_1968_4_12_a13 ER -