@article{ELMA_1968__23_140891,
     author = {W.-D. Klix},
     title = {Netzprojektion eines {Tetraeders.}},
     journal = {Elemente der Mathematik},
     pages = {78--85},
     publisher = {mathdoc},
     volume = {23},
     year = {1968},
     zbl = {0159.22205},
     url = {http://geodesic.mathdoc.fr/item/ELMA_1968__23_140891/}
}