%0 Journal Article %A S. A. Vladimirov %T Ordinary differential equations with a discrete symmetry group %J Differencialʹnye uravneniâ %D 1975 %P 1180-1189 %V 11 %N 7 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1975_11_7_a3/ %G ru %F DE_1975_11_7_a3