@article{MZ_1977__154_172516,
     author = {Dieter Betten},
     title = {4-dimensionale {Translationsebenen} mit kommutativer {Standgruppe.}},
     journal = {Mathematische Zeitschrift},
     pages = {125--142},
     publisher = {mathdoc},
     volume = {154},
     year = {1977},
     zbl = {0335.50016},
     url = {http://geodesic.mathdoc.fr/item/MZ_1977__154_172516/}
}