TY  - JOUR
AU  - A. V. Aleksandrov
TI  - The Poincaré problem for second-order elliptic systems on a plane in Hardy-type classes
JO  - Differencialʹnye uravneniâ
PY  - 1997
SP  - 1069
EP  - 1075
VL  - 33
IS  - 8
UR  - http://geodesic.mathdoc.fr/item/DE_1997_33_8_a8/
LA  - ru
ID  - DE_1997_33_8_a8
ER  -