TY  - JOUR
AU  - V. A. Il'in
TI  - A generalized principle of localization for the Riesz means that correspond to an arbitrary selfadjoint nonnegative extension of the Laplace operator
JO  - Differencialʹnye uravneniâ
PY  - 1970
SP  - 1159
EP  - 1169
VL  - 6
IS  - 7
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1970_6_7_a1/
LA  - ru
ID  - DE_1970_6_7_a1
ER  -