@article{MZ_1978__159_172657,
     author = {Edzard Salow},
     title = {Endliche {Pr\"a-Hjelmslev-Gruppen.}},
     journal = {Mathematische Zeitschrift},
     pages = {215--234},
     publisher = {mathdoc},
     volume = {159},
     year = {1978},
     zbl = {0358.20022},
     url = {http://geodesic.mathdoc.fr/item/MZ_1978__159_172657/}
}