@article{GDZPPN002420546, title = {Endliche Pr\"a-Hjelmslev-Gruppen.}, journal = {Mathematische Zeitschrift}, volume = {162}, year = {1978}, pages = {215-234}, zbl = {0358.20022}, url = {http://dml.mathdoc.fr/item/GDZPPN002420546} }
Salow, Edzard. Endliche Prä-Hjelmslev-Gruppen.. Mathematische Zeitschrift, Tome 162 (1978) pp. 215-234. http://gdmltest.u-ga.fr/item/GDZPPN002420546/