%0 Journal Article %A M. A. Amatov %T Periodic solutions of a certain autonomous system of ordinary differential equations with discontinuous right-hand sides %J Differencialʹnye uravneniâ %D 1973 %P 1937-1944 %V 9 %N 11 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1973_9_11_a1/ %G ru %F DE_1973_9_11_a1