@article{JRAM_1950__187_150162,
     author = {Otto Haupt and Franz Denk},
     title = {\"Uber die {Windungsmonotonie} der {Elementarbogen} im {R(n).}},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {95--108},
     publisher = {mathdoc},
     volume = {187},
     year = {1950},
     zbl = {0034.39403},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1950__187_150162/}
}