%0 Journal Article
%T Nikola{\v\i} Pavlovi{\v{c}} Erugin (on the occasion of his seventieth birthday)
%J Differencialʹnye uravneniâ
%D 1977
%P 961-962
%V 13
%N 5
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_1977_13_5_a23/
%G ru
%F DE_1977_13_5_a23