TY - JOUR AU - W. I. Fushchych AU - S. P. Onufriichuk TI - On the invariance groups of one class of the enumerable system of the first-order partial differential equations JO - Doklady Akademii Nauk PY - 1977 SP - 1056 EP - 1059 VL - 235 IS - 5 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DAN_1977_235_5_a17/ LA - ru ID - DAN_1977_235_5_a17 ER -