TY  - JOUR
AU  - N. B. Kerimov
TI  - Necessary conditions for the property of being a basis in $L_2(G)$ for a system of eigen- and associated functions of a second-order
JO  - Doklady Akademii Nauk
PY  - 1988
SP  - 809
EP  - 811
VL  - 299
IS  - 4
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DAN_1988_299_4_a8/
LA  - ru
ID  - DAN_1988_299_4_a8
ER  -