@article{MZ_1972__128_171793,
     author = {Dieter Betten},
     title = {4-dimensionale {Translationsebenen.}},
     journal = {Mathematische Zeitschrift},
     pages = {129--152},
     publisher = {mathdoc},
     volume = {128},
     year = {1972},
     zbl = {0231.50011},
     url = {http://geodesic.mathdoc.fr/item/MZ_1972__128_171793/}
}