%0 Journal Article %A G. G. Gafarov %T Symmetries and first integrals of dynamical systems %J Differencialʹnye uravneniâ %D 1990 %P 531-532 %V 26 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1990_26_3_a22/ %G ru %F DE_1990_26_3_a22