TY  - JOUR
AU  - G. A. Il'yushina
TI  - The generalized localization principle for spectral expansions connected with the Beltrami operator
JO  - Differencialʹnye uravneniâ
PY  - 1971
SP  - 1845
EP  - 1853
VL  - 7
IS  - 10
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1971_7_10_a10/
LA  - ru
ID  - DE_1971_7_10_a10
ER  -