%0 Journal Article
%A I. P. Karklin'
%T Topological equivalence of linear systems of Pfaffian equations in neighborhoods of their one-dimensional closed characteristics
%J Differencialʹnye uravneniâ
%D 1972
%P 1943-1949
%V 8
%N 11
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_1972_8_11_a3/
%G ru
%F DE_1972_8_11_a3