@article{MZ_1957__67_169680,
     author = {Wolfgang Walter},
     title = {\"uber die {Euler-Poisson-Darboux-Gleichung.}},
     journal = {Mathematische Zeitschrift},
     pages = {361--376},
     year = {1957},
     volume = {67},
     language = {de},
     url = {http://geodesic.mathdoc.fr/item/MZ_1957__67_169680/}
}