TY  - JOUR
AU  - Nguyẽn Minh Trí
TI  - On the global hypoellipticity property of a higher-order differential operator
JO  - Differencialʹnye uravneniâ
PY  - 1990
SP  - 687
EP  - 692
VL  - 26
IS  - 4
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1990_26_4_a16/
LA  - ru
ID  - DE_1990_26_4_a16
ER  -