TY  - JOUR
AU  - L. V. Ovsyannikov
TI  - Determination of the group of a linear second-order differential equation
JO  - Doklady Akademii Nauk
PY  - 1960
SP  - 44
EP  - 47
VL  - 132
IS  - 1
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DAN_1960_132_1_a9/
LA  - ru
ID  - DAN_1960_132_1_a9
ER  -