%0 Journal Article
%A E. K. Makarov
%T The Characteristic Sets of Multidimensional Equations with Respect to a Polyhedral Cone Can Be Nonclosed
%J Differencialʹnye uravneniâ
%D 2003
%P 560-562
%V 39
%N 4
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_2003_39_4_a14/
%G ru
%F DE_2003_39_4_a14