%0 Journal Article
%A È. R. Rozendorn
%T Some class of surfaces of negative curvature with singularities on lines
%J Vestnik Moskovskogo universiteta. Matematika, mehanika
%D 1985
%P 50-52
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/item/VMUMM_1985_1_a10/
%G ru
%F VMUMM_1985_1_a10