TY  - JOUR
AU  - A. V. Ivanov
TI  - On some second order elliptic systems
JO  - Zapiski Nauchnykh Seminarov POMI
PY  - 1971
SP  - 34
EP  - 41
VL  - 21
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/ZNSL_1971_21_a2/
LA  - ru
ID  - ZNSL_1971_21_a2
ER  -