%0 Journal Article %A I. S. Kukles %A I. G. Rozet %T The singular separatrix cycles of a quadratic differential equation that has a straight line as a solution %J Differencialʹnye uravneniâ %D 1971 %P 1813-1818 %V 7 %N 10 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1971_7_10_a6/ %G ru %F DE_1971_7_10_a6