@article{JRAM_1941__183_183502,
     author = {Otto Haupt and Franz Denk},
     title = {\"Uber die {Singularit\"aten} reeller {Bogen} im {Rn.}},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {69--91},
     publisher = {mathdoc},
     volume = {183},
     year = {1941},
     zbl = {0024.28302},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1941__183_183502/}
}