@article{ELMA_1988__43_3_141432,
     author = {H. Zeitler},
     title = {Klassisches und {Modernes} \"uber {Steiner} {Tripelsysteme.}},
     journal = {Elemente der Mathematik},
     pages = {97--112},
     publisher = {mathdoc},
     volume = {43},
     number = {3},
     year = {1988},
     zbl = {0699.05011},
     url = {http://geodesic.mathdoc.fr/item/ELMA_1988__43_3_141432/}
}