@article{3136,
author = {Carvalho e Silva, Jaime},
title = {A sufficient condition for the well posedness of a Goursat problem},
journal = {Portugaliae mathematica},
volume = {45},
year = {1988},
pages = {221-228},
zbl = {0666.35017},
mrnumber = {0952540},
language = {en},
url = {http://dml.mathdoc.fr/item/3136}
}
Carvalho e Silva, Jaime. A sufficient condition for the well posedness of a Goursat problem. Portugaliae mathematica, Tome 45 (1988) pp. 221-228. http://gdmltest.u-ga.fr/item/3136/