TY  - JOUR
AU  - V. V. Tikhomirov
TI  - On the Riesz means of expansions in a trigonometric Fourier series and in the eigenfunctions of a Keldys pencil of ordinary nonselfadjoint differential operators
JO  - Doklady Akademii Nauk
PY  - 1976
SP  - 1015
EP  - 1017
VL  - 226
IS  - 5
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DAN_1976_226_5_a6/
LA  - ru
ID  - DAN_1976_226_5_a6
ER  -