@article{1250520761, author = {Hasegawa, Yukiko}, title = {On the Levi condition for Goursat problem}, journal = {J. Math. Kyoto Univ.}, volume = {27}, number = {4}, year = {1987}, pages = { 1-25}, language = {en}, url = {http://dml.mathdoc.fr/item/1250520761} }
Hasegawa, Yukiko. On the Levi condition for Goursat problem. J. Math. Kyoto Univ., Tome 27 (1987) no. 4, pp. 1-25. http://gdmltest.u-ga.fr/item/1250520761/