@article{MZ_1965__89_170427,
     author = {Heinz L\"uneburg},
     title = {Fahnenhomogene {Quadrupelsysteme.}},
     journal = {Mathematische Zeitschrift},
     pages = {82--90},
     publisher = {mathdoc},
     volume = {89},
     year = {1965},
     url = {http://geodesic.mathdoc.fr/item/MZ_1965__89_170427/}
}