%0 Journal Article %A I. Ya. Viner %T Differential equations with involutions %J Differencialʹnye uravneniâ %D 1969 %P 1131-1137 %V 5 %N 6 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1969_5_6_a17/ %G ru %F DE_1969_5_6_a17