TY  - JOUR
AU  - Toshinori Ôaku
TI  - A Canonical Form of a System of Microdifferential Equations with Non-Involutory Characteristics and Branching of Singularities.
JO  - Inventiones mathematicae
PY  - 1981
SP  - 491
EP  - 525
VL  - 65
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/IM_1981__65_142864/
ID  - IM_1981__65_142864
ER  -