TY  - JOUR
AU  - F. G. Maksudov
AU  - Z. I. Ismailov
TI  - Normal extensions of second-order differential operators
JO  - Differencialʹnye uravneniâ
PY  - 1994
SP  - 1823
EP  - 1824
VL  - 30
IS  - 10
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1994_30_10_a21/
LA  - ru
ID  - DE_1994_30_10_a21
ER  -