%0 Journal Article
%A M. D. Kovalev
%T A~characteristic property of a~disc
%J Informatics and Automation
%D 1980
%P 124-137
%V 152
%I mathdoc
%U http://geodesic.mathdoc.fr/item/TRSPY_1980_152_a6/
%G ru
%F TRSPY_1980_152_a6