@article{MZ_1931__33_168273,
     author = {K., Maruhn},
     title = {Ein {Beitrag} zur mathematischen {Theorie} der {Gestalt} der {Himmelsk\"orper}},
     journal = {Mathematische Zeitschrift},
     pages = {300--320},
     publisher = {mathdoc},
     volume = {33},
     year = {1931},
     zbl = {0001.07303},
     url = {http://geodesic.mathdoc.fr/item/MZ_1931__33_168273/}
}