@article{1195519061,
author = {Matsumoto, Waichir\^o},
title = {Uniqueness in the Cauchy problem for partial differential equations with multiple characteristic roots},
journal = {Proc. Japan Acad.},
volume = {50},
number = {1},
year = {1974},
pages = { 100-103},
language = {en},
url = {http://dml.mathdoc.fr/item/1195519061}
}
Matsumoto, Waichirô. Uniqueness in the Cauchy problem for partial differential equations with multiple characteristic roots. Proc. Japan Acad., Tome 50 (1974) no. 1, pp. 100-103. http://gdmltest.u-ga.fr/item/1195519061/