@article{MZ_1950__52_169131,
     author = {P. Lorenzen},
     title = {\"Uber halbgeordnete {Gruppen}},
     journal = {Mathematische Zeitschrift},
     pages = {483--526},
     publisher = {mathdoc},
     volume = {52},
     year = {1950},
     zbl = {0035.29303},
     url = {http://geodesic.mathdoc.fr/item/MZ_1950__52_169131/}
}