@article{ELMA_1986__41_141370,
     author = {Helmut Pottmann},
     title = {Zum {Satz} von {Holditch} in der euklidischen {Ebene.}},
     journal = {Elemente der Mathematik},
     pages = {1--6},
     year = {1986},
     volume = {41},
     zbl = {0584.53005},
     url = {http://geodesic.mathdoc.fr/item/ELMA_1986__41_141370/}
}