%0 Journal Article %A Yu. F. Shain %T An investigation of a system of equations describing the motion of a spherical pendulum in the case of the presence of a resistance %J Differencialʹnye uravneniâ %D 1967 %P 1477-1483 %V 3 %N 9 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1967_3_9_a6/ %G ru %F DE_1967_3_9_a6