%0 Journal Article %A O. M. Yudrups %T Continual equivalence of dynamical systems on the sphere %J Differencialʹnye uravneniâ %D 1978 %P 753-754 %V 14 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1978_14_4_a25/ %G ru %F DE_1978_14_4_a25