%0 Journal Article %A W. I. Fushchych %A S. P. Onufriichuk %T On the invariance groups of one class of the enumerable system of the first-order partial differential equations %J Doklady Akademii Nauk %D 1977 %P 1056-1059 %V 235 %N 5 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1977_235_5_a17/ %G ru %F DAN_1977_235_5_a17