%0 Journal Article
%T Zabreiko Petr Petrovich
%J Journal of the Belarusian State University. Mathematics and Informatics
%D 2019
%P 90-92
%V 1
%I mathdoc
%U http://geodesic.mathdoc.fr/item/BGUMI_2019_1_a10/
%G ru
%F BGUMI_2019_1_a10