%0 Journal Article
%A R. Oinarov
%A M. Otelbaev
%T A criterion for a Urysohn operator to be a contraction
%J Doklady Akademii Nauk
%D 1980
%P 1316-1318
%V 255
%N 6
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1980_255_6_a7/
%G ru
%F DAN_1980_255_6_a7