%0 Journal Article
%A Toshinori Ôaku
%T A Canonical Form of a System of Microdifferential Equations with Non-Involutory Characteristics and Branching of Singularities.
%J Inventiones mathematicae
%D 1981
%P 491-525
%V 65
%I mathdoc
%U http://geodesic.mathdoc.fr/item/IM_1981__65_142864/
%F IM_1981__65_142864