%0 Journal Article
%A Ya. A. Roitberg
%T Homeomorphism theorems and a~Green's formula for general elliptic boundary problems with nonnormal boundary conditions
%J Sbornik. Mathematics
%D 1970
%P 177-212
%V 12
%N 2
%I mathdoc
%U http://geodesic.mathdoc.fr/item/SM_1970_12_2_a2/
%G en
%F SM_1970_12_2_a2