TY  - JOUR
AU  - P. R. Popivanov
TI  - Hypoellipticity of differential operators in the class of generalized periodic functions
JO  - Doklady Akademii Nauk
PY  - 1982
SP  - 565
EP  - 568
VL  - 266
IS  - 3
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DAN_1982_266_3_a11/
LA  - ru
ID  - DAN_1982_266_3_a11
ER  -