@article{JRAM_1966__224_150761,
     author = {J\"urgen Schmidt and Fritz Ostermann},
     title = {Der baryzentrische {Kalk\"ul} als axiomatische {Grundlage} der affinen {Geometrie.}},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {44--57},
     publisher = {mathdoc},
     volume = {224},
     year = {1966},
     zbl = {0146.16202},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1966__224_150761/}
}