@article{1103036507, author = {Tucker, D. H.}, title = {An existence theorem for a Goursat problem.}, journal = {Pacific J. Math.}, volume = {12}, number = {4}, year = {1962}, pages = { 719-727}, language = {en}, url = {http://dml.mathdoc.fr/item/1103036507} }
Tucker, D. H. An existence theorem for a Goursat problem.. Pacific J. Math., Tome 12 (1962) no. 4, pp. 719-727. http://gdmltest.u-ga.fr/item/1103036507/