%0 Journal Article
%A A. G. Kuz'min
%T On the behavior of characteristics of equations of mixed type with a closed line of degeneracy
%J Differencialʹnye uravneniâ
%D 1982
%P 533-534
%V 18
%N 3
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_1982_18_3_a19/
%G ru
%F DE_1982_18_3_a19