%0 Journal Article
%A I. Kupka
%T Introduction of the Theory of Systems. / I. Kupka.
%J Ensaios Matemáticos
%D 1991
%P 5-108
%V 4
%I mathdoc
%U http://geodesic.mathdoc.fr/item/ENMA_1991__4_186560/
%F ENMA_1991__4_186560