TY  - JOUR
AU  - E. S. Kostenko
TI  - Group properties of ordinary second order linear differential equations
JO  - Differencialʹnye uravneniâ
PY  - 1972
SP  - 727
EP  - 730
VL  - 8
IS  - 4
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1972_8_4_a19/
LA  - ru
ID  - DE_1972_8_4_a19
ER  -