%0 Journal Article
%A Chrastina, Jan
%T On formal theory of differential equations. I
%J Časopis pro pěstování matematiky
%D 1986
%P 353-383
%V 111
%N 4
%I mathdoc
%U http://geodesic.mathdoc.fr/articles/10.21136/CPM.1986.118285/
%R 10.21136/CPM.1986.118285
%G en
%F 10_21136_CPM_1986_118285