TY  - JOUR
AU  - N. P. Kuptsov
TI  - Conditions for non-selfadjointness of a second-order linear differential operator
JO  - Doklady Akademii Nauk
PY  - 1961
SP  - 767
EP  - 770
VL  - 138
IS  - 4
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DAN_1961_138_4_a6/
LA  - ru
ID  - DAN_1961_138_4_a6
ER  -