@article{MZ_1942__48_169010,
     author = {F. Klein-Barmen},
     title = {\"Uber gewisse {Halbverb\"ande} und kommutative {Semigruppen.} {Zweiter} {Teil}},
     journal = {Mathematische Zeitschrift},
     pages = {715--734},
     publisher = {mathdoc},
     volume = {48},
     year = {1942},
     zbl = {68.0045.02},
     url = {http://geodesic.mathdoc.fr/item/MZ_1942__48_169010/}
}