TY  - JOUR
AU  - L. A. Ivanov
TI  - On lacunae for operators splitting into Euler--Poisson--Darboux factors
JO  - Doklady Akademii Nauk
PY  - 1977
SP  - 535
EP  - 538
VL  - 233
IS  - 4
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DAN_1977_233_4_a6/
LA  - ru
ID  - DAN_1977_233_4_a6
ER  -