TY  - JOUR
AU  - L. V. Ovsyannikov
TI  - Groups and invariant-group solutions of differential equations
JO  - Doklady Akademii Nauk
PY  - 1958
SP  - 439
EP  - 442
VL  - 118
IS  - 3
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DAN_1958_118_3_a5/
LA  - ru
ID  - DAN_1958_118_3_a5
ER  -