TY  - JOUR
AU  - J. V. Rybalov
TI  - The discreteness of the spectrum of the first boundary value problem for a nonregular elliptic equation
JO  - Differencialʹnye uravneniâ
PY  - 1984
SP  - 1602
EP  - 1611
VL  - 20
IS  - 9
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1984_20_9_a18/
LA  - ru
ID  - DE_1984_20_9_a18
ER  -