@article{BAG_1987__24_138363,
     author = {Andreas W.M. Dress and Reinhard Franz},
     title = {Zur {Parametrisierung} von {Untergruppen} freier {Gruppen}},
     journal = {Beitr\"age zur Algebra und Geometrie},
     pages = {125--134},
     publisher = {mathdoc},
     volume = {24},
     year = {1987},
     language = {de},
     url = {http://geodesic.mathdoc.fr/item/BAG_1987__24_138363/}
}