@article{ELMA_1988__43_3_141427,
     author = {H. Stachel},
     title = {Ein bewegliches {Tetraederpaar.}},
     journal = {Elemente der Mathematik},
     pages = {65--75},
     publisher = {mathdoc},
     volume = {43},
     number = {3},
     year = {1988},
     zbl = {0699.53012},
     url = {http://geodesic.mathdoc.fr/item/ELMA_1988__43_3_141427/}
}