@article{1250522871, author = {Igari, Katsuju}, title = {A necessary condition for well-posed Cauchy problems}, journal = {J. Math. Kyoto Univ.}, volume = {16}, number = {3}, year = {1976}, pages = { 531-543}, language = {en}, url = {http://dml.mathdoc.fr/item/1250522871} }
Igari, Katsuju. A necessary condition for well-posed Cauchy problems. J. Math. Kyoto Univ., Tome 16 (1976) no. 3, pp. 531-543. http://gdmltest.u-ga.fr/item/1250522871/