@article{MAN_1976__220_162804,
     author = {Jochen Br\"uning and Wolfgang Willgerodt},
     title = {Eine {Verallgemeinerung} eines {Satzes} von {N.} {Kuiper.}},
     journal = {Mathematische Annalen},
     pages = {47--58},
     publisher = {mathdoc},
     volume = {220},
     year = {1976},
     zbl = {0304.46040},
     url = {http://geodesic.mathdoc.fr/item/MAN_1976__220_162804/}
}