%0 Journal Article %A V. P. Didenko %T On some systems of differential equations of mixed and mixed-compound types %J Differencialʹnye uravneniâ %D 1966 %P 33-46 %V 2 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1966_2_1_a2/ %G ru %F DE_1966_2_1_a2