TY - JOUR AU - W. I. Fushchych TI - On a new method of the investigation of group properties of the mathematical physic equations JO - Doklady Akademii Nauk PY - 1979 SP - 846 EP - 850 VL - 246 IS - 4 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DAN_1979_246_4_a21/ LA - ru ID - DAN_1979_246_4_a21 ER -