@article{1250522068,
author = {Igari, Katsuju},
title = {An admissible data class of the Cauchy problem for non-strictly hyperbolic operators},
journal = {J. Math. Kyoto Univ.},
volume = {21},
number = {4},
year = {1981},
pages = { 351-373},
language = {en},
url = {http://dml.mathdoc.fr/item/1250522068}
}
Igari, Katsuju. An admissible data class of the Cauchy problem for non-strictly hyperbolic operators. J. Math. Kyoto Univ., Tome 21 (1981) no. 4, pp. 351-373. http://gdmltest.u-ga.fr/item/1250522068/