TY  - JOUR
AU  - R. S. Ismagilov
TI  - Self-adjointness conditions of higher-order differential operators
JO  - Doklady Akademii Nauk
PY  - 1962
SP  - 1239
EP  - 1242
VL  - 142
IS  - 6
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DAN_1962_142_6_a5/
LA  - ru
ID  - DAN_1962_142_6_a5
ER  -