%0 Journal Article
%A N. A. Izobov
%A E. N. Krupchik
%T Necessary Properties of Boundary Degree Sets of Solutions to Linear Pfaff Systems
%J Differencialʹnye uravneniâ
%D 2001
%P 616-627
%V 37
%N 5
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_2001_37_5_a5/
%G ru
%F DE_2001_37_5_a5