%0 Journal Article
%A È. R. Rozendorn
%T Properties of asymptotic lines on surfaces with slowly varying negative curvature
%J Doklady Akademii Nauk
%D 1962
%P 538-540
%V 145
%N 3
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1962_145_3_a16/
%G ru
%F DAN_1962_145_3_a16