@article{MZ_1992__210_1_174426,
     author = {Klaus Langmann},
     title = {Globale und lokale {Erzeugendenanzahl} im {Reellen.}},
     journal = {Mathematische Zeitschrift},
     pages = {655--660},
     publisher = {mathdoc},
     volume = {210},
     number = {1},
     year = {1992},
     language = {de},
     url = {http://geodesic.mathdoc.fr/item/MZ_1992__210_1_174426/}
}