TY  - JOUR
AU  - N. T. Pham
TI  - Boundary value problems for natural differential operators on manifolds
JO  - Differencialʹnye uravneniâ
PY  - 1970
SP  - 877
EP  - 888
VL  - 6
IS  - 5
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1970_6_5_a11/
LA  - ru
ID  - DE_1970_6_5_a11
ER  -