%0 Journal Article
%A V. A. Andrunakievich
%A N. P. Erugin
%A Yu. S. Bogdanov
%T Konstantin Sergeevi{\v{c}} Sibirski{\v\i} (on the occasion of his fiftieth birthday)
%J Differencialʹnye uravneniâ
%D 1978
%P 565-570
%V 14
%N 3
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_1978_14_3_a25/
%G ru
%F DE_1978_14_3_a25