@article{JRAM_1937__176_149983,
     author = {Otto Haupt},
     title = {Zur {Differentialgeometrie} k-dimensionaler {Gebilde} im {Rn.}},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {95--111},
     publisher = {mathdoc},
     volume = {176},
     year = {1937},
     zbl = {0015.26604},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1937__176_149983/}
}