@article{MAN_1947__120_160153,
     author = {G\"unter Pickert},
     title = {Elementare {Behandlung} des {Helmholtzschen} {Raumproblems}},
     journal = {Mathematische Annalen},
     pages = {492--501},
     publisher = {mathdoc},
     volume = {120},
     year = {1947},
     zbl = {0034.23702},
     url = {http://geodesic.mathdoc.fr/item/MAN_1947__120_160153/}
}