%0 Journal Article
%A R. Ts. Musaelyan
%T The existence of infinite polygons in a~two-dimensional metric of variable negative curvature
%J Sbornik. Mathematics
%D 1994
%P 459-469
%V 79
%N 2
%I mathdoc
%U http://geodesic.mathdoc.fr/item/SM_1994_79_2_a12/
%G en
%F SM_1994_79_2_a12