%0 Journal Article
%A B. P. Kufarev
%T Relations of the type ``length and area principle''
%J Doklady Akademii Nauk
%D 1966
%P 268-270
%V 170
%N 2
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1966_170_2_a8/
%G ru
%F DAN_1966_170_2_a8