%0 Journal Article
%A Chrastina, Jan
%T On formal theory of differential equations. II
%J Časopis pro pěstování matematiky
%D 1989
%P 60-105
%V 114
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/articles/10.21136/CPM.1989.118369/
%R 10.21136/CPM.1989.118369
%G en
%F 10_21136_CPM_1989_118369