TY  - JOUR
AU  - A. I. Vahabov
TI  - Fourier series expansions in principal functions of an elliptic operator
JO  - Differencialʹnye uravneniâ
PY  - 1987
SP  - 1736
EP  - 1745
VL  - 23
IS  - 10
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1987_23_10_a9/
LA  - ru
ID  - DE_1987_23_10_a9
ER  -