@article{3779,
author = {Carvalho e Silva, Jaime},
title = {On the hyperbolicity of a third order operator and the generalized Goursat-Darboux problem},
journal = {Portugaliae mathematica},
volume = {46},
year = {1989},
pages = {567-577},
zbl = {0768.35056},
mrnumber = {1080774},
language = {en},
url = {http://dml.mathdoc.fr/item/3779}
}
Carvalho e Silva, Jaime. On the hyperbolicity of a third order operator and the generalized Goursat-Darboux problem. Portugaliae mathematica, Tome 46 (1989) pp. 567-577. http://gdmltest.u-ga.fr/item/3779/