%0 Journal Article
%A Ya. A. Roitberg
%A Z. G. Sheftel
%T A theorem on homeomorphisms for elliptic systems and its applications
%J Sbornik. Mathematics
%D 1969
%P 439-465
%V 7
%N 3
%U http://geodesic.mathdoc.fr/item/SM_1969_7_3_a9/
%G en
%F SM_1969_7_3_a9