@article{JRAM_1940__181_150074,
     author = {Friedrich Bachmann},
     title = {Die {Bewegungsgruppe} einer ebenen {Cayleyschen} {Geometrie.}},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {242--252},
     publisher = {mathdoc},
     volume = {181},
     year = {1940},
     zbl = {0022.38101},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1940__181_150074/}
}