%0 Journal Article
%A Yu. F. Borisov
%T A~half-neighborhood and the variation of length of a~curve on a~surface
%J Informatics and Automation
%D 1965
%P 26-48
%V 76
%I mathdoc
%U http://geodesic.mathdoc.fr/item/TRSPY_1965_76_a2/
%G ru
%F TRSPY_1965_76_a2