%0 Journal Article
%A A. S. Vinogradskii
%T Boundary properties of surfaces with slowly varying negative curvature
%J Sbornik. Mathematics
%D 1970
%P 257-271
%V 11
%N 2
%I mathdoc
%U http://geodesic.mathdoc.fr/item/SM_1970_11_2_a9/
%G en
%F SM_1970_11_2_a9