@article{CMH_1933__5_138602,
     author = {W. M\"achler},
     title = {Laplace'sche {Integraltransformation} und {Integration} partieller {Differentialgleichungen} vom hyperbolischen und parabolischen {Typus.}},
     journal = {Commentarii mathematici Helvetici},
     pages = {256--304},
     publisher = {mathdoc},
     volume = {5},
     year = {1933},
     zbl = {59.1143.01},
     url = {http://geodesic.mathdoc.fr/item/CMH_1933__5_138602/}
}