@article{1250522764,
author = {Miyatake, Sadao},
title = {A sharp form of the existence theorem for hyperbolic mixed problems of second order},
journal = {J. Math. Kyoto Univ.},
volume = {17},
number = {3},
year = {1977},
pages = { 199-223},
language = {en},
url = {http://dml.mathdoc.fr/item/1250522764}
}
Miyatake, Sadao. A sharp form of the existence theorem for hyperbolic mixed problems of second order. J. Math. Kyoto Univ., Tome 17 (1977) no. 3, pp. 199-223. http://gdmltest.u-ga.fr/item/1250522764/