%0 Journal Article
%A N. P. Erugin
%T Nikola{\v\i} Evgrafovi{\v{c}} Ko{\v{c}}in (on the occasion of the 75th anniversary of his birth)
%J Differencialʹnye uravneniâ
%D 1976
%P 1327-1331
%V 12
%N 7
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_1976_12_7_a25/
%G ru
%F DE_1976_12_7_a25