@article{MZ_1956__64_169559,
     author = {Helmut Karzel},
     title = {\"Uber eine {Anordnungsbeziehung} am {Dreieck.}},
     journal = {Mathematische Zeitschrift},
     pages = {131--137},
     publisher = {mathdoc},
     volume = {64},
     year = {1956},
     zbl = {0072.15404},
     url = {http://geodesic.mathdoc.fr/item/MZ_1956__64_169559/}
}