@article{MAN_1921__83_158862,
     author = {K. Reidemeister},
     title = {\"Uber die singul\"aren {Randpunkte} eines konvexen {K\"orpers}},
     journal = {Mathematische Annalen},
     pages = {116--118},
     publisher = {mathdoc},
     volume = {83},
     year = {1921},
     zbl = {48.0835.03},
     url = {http://geodesic.mathdoc.fr/item/MAN_1921__83_158862/}
}