@article{GDZPPN002259001, title = {Zur Integration partieller Differentialgleichungen}, journal = {Mathematische Annalen}, volume = {56}, year = {1903}, pages = {585-614}, zbl = {34.0380.01}, url = {http://dml.mathdoc.fr/item/GDZPPN002259001} }
Boehm, Karl. Zur Integration partieller Differentialgleichungen. Mathematische Annalen, Tome 56 (1903) pp. 585-614. http://gdmltest.u-ga.fr/item/GDZPPN002259001/