TY  - JOUR
AU  - Ya. A. Roitberg
AU  - Z. G. Sheftel
TI  - A~theorem on homeomorphisms for elliptic systems and its applications
JO  - Sbornik. Mathematics
PY  - 1969
SP  - 439
EP  - 465
VL  - 7
IS  - 3
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/SM_1969_7_3_a9/
LA  - en
ID  - SM_1969_7_3_a9
ER  -