%0 Journal Article
%A I. V. Gaishun
%T Observable Linear Nonstationary Systems of Total Differential Equations
%J Differencialʹnye uravneniâ
%D 2003
%P 1299-1306
%V 39
%N 10
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_2003_39_10_a0/
%G ru
%F DE_2003_39_10_a0