@article{CMH_1992__67_3_140274,
     author = {Klaus Langmann},
     title = {Minimale {Erzeugendenanzahl} von {Moduln.}},
     journal = {Commentarii mathematici Helvetici},
     pages = {349--362},
     publisher = {mathdoc},
     volume = {67},
     number = {3},
     year = {1992},
     language = {de},
     url = {http://geodesic.mathdoc.fr/item/CMH_1992__67_3_140274/}
}