TY  - JOUR
AU  - V. A. Il'in
TI  - A generalized principle of localization for the Riesz means of a Fourier series in an arbitrary fundamental system of functions of the Laplace operator with discrete spectrum
JO  - Differencialʹnye uravneniâ
PY  - 1970
SP  - 1143
EP  - 1158
VL  - 6
IS  - 7
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1970_6_7_a0/
LA  - ru
ID  - DE_1970_6_7_a0
ER  -