TY  - JOUR
AU  - V. A. Il'in
TI  - Riesz means, Ces\`aro and Poisson--Abel summability of Fourier series of eigenfunctions
JO  - Differencialʹnye uravneniâ
PY  - 1966
SP  - 816
EP  - 827
VL  - 2
IS  - 6
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1966_2_6_a9/
LA  - ru
ID  - DE_1966_2_6_a9
ER  -