%0 Journal Article %A Yu. S. Kolesov %T A bifurcation theorem in the theory of self-oscillations of distributed systems %J Differencialʹnye uravneniâ %D 1985 %P 1709-1713 %V 21 %N 10 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1985_21_10_a8/ %G ru %F DE_1985_21_10_a8