@article{MZ_1921__10_167640,
     author = {K., Reidemeister},
     title = {\"Uber {K\"orper} konstanten {Durchmessers}},
     journal = {Mathematische Zeitschrift},
     pages = {214--216},
     year = {1921},
     volume = {10},
     zbl = {48.0835.02},
     url = {http://geodesic.mathdoc.fr/item/MZ_1921__10_167640/}
}