@article{1225113725,
author = {HASEGAWA, Yukiko},
title = {On the $C^{\infty}$
-Goursat problem for some second order equations with variable coefficients},
journal = {J. Math. Soc. Japan},
volume = {50},
number = {4},
year = {1998},
pages = { 639-662},
language = {en},
url = {http://dml.mathdoc.fr/item/1225113725}
}
HASEGAWA, Yukiko. On the $C^{\infty}$
-Goursat problem for some second order equations with variable coefficients. J. Math. Soc. Japan, Tome 50 (1998) no. 4, pp. 639-662. http://gdmltest.u-ga.fr/item/1225113725/