%0 Journal Article %T Vedernikov Vasily Ivanovich %J Journal of the Belarusian State University. Mathematics and Informatics %D 2019 %P 96-98 %V 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/BGUMI_2019_1_a12/ %G ru %F BGUMI_2019_1_a12