TY  - JOUR
AU  - G. A. Smolkin
TI  - On the hypoellipticity of a~special class of differential operators
JO  - Matematičeskoe modelirovanie
PY  - 1995
SP  - 63
VL  - 7
IS  - 5
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/MM_1995_7_5_a36/
LA  - ru
ID  - MM_1995_7_5_a36
ER  -