@article{MZ_1932__34_168297,
     author = {W. v. Ignatowsky},
     title = {\"Uber doppelpolige {L\"osungen} der {Wellengleichung}},
     journal = {Mathematische Zeitschrift},
     pages = {1--34},
     publisher = {mathdoc},
     volume = {34},
     year = {1932},
     zbl = {0002.13701},
     url = {http://geodesic.mathdoc.fr/item/MZ_1932__34_168297/}
}