%0 Journal Article %A A. È. Malevich %T Periodic orbits of multidimensional dynamical systems %J Differencialʹnye uravneniâ %D 1985 %P 1446-1449 %V 21 %N 8 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1985_21_8_a22/ %G ru %F DE_1985_21_8_a22