@article{MAN_1921__83_158861,
     author = {J. Radon},
     title = {Mengen konvexer {K\"orper,} die einen gemeinsamen {Punkt} enthalten},
     journal = {Mathematische Annalen},
     pages = {113--115},
     publisher = {mathdoc},
     volume = {83},
     year = {1921},
     zbl = {48.0834.04},
     url = {http://geodesic.mathdoc.fr/item/MAN_1921__83_158861/}
}