TY  - JOUR
AU  - Sordoni, V.
TI  - Necessary and sufficient conditions for the well posedness of the Cauchy problem for a class of hyperbolic operators with high variable multiplicity
JO  - Rendiconti del Seminario Matematico della Università di Padova
PY  - 1992
SP  - 263
EP  - 280
VL  - 88
PB  - Seminario Matematico of the University of Padua
UR  - http://www.numdam.org/item/RSMUP_1992__88__263_0/
LA  - en
ID  - RSMUP_1992__88__263_0
ER  -