@article{1250522713,
author = {Igari, Katsuju},
title = {Cauchy problem in Gevrey classes for non-strictly hyperbolic equations of second order},
journal = {J. Math. Kyoto Univ.},
volume = {17},
number = {3},
year = {1977},
pages = { 513-531},
language = {en},
url = {http://dml.mathdoc.fr/item/1250522713}
}
Igari, Katsuju. Cauchy problem in Gevrey classes for non-strictly hyperbolic equations of second order. J. Math. Kyoto Univ., Tome 17 (1977) no. 3, pp. 513-531. http://gdmltest.u-ga.fr/item/1250522713/