@article{JRAM_1942__184_150103,
     author = {Gerhard Gr\"u{\ss}},
     title = {Zur anschaulichen {Geometrie} der {Tangentenfl\"achen} einer {Raumkurve.}},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {65--76},
     publisher = {mathdoc},
     volume = {184},
     year = {1942},
     zbl = {0026.25901},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1942__184_150103/}
}