@article{MAN_1969__180_161803,
     author = {K. SPALLEK},
     title = {Differenzierbare {R\"aume.}},
     journal = {Mathematische Annalen},
     pages = {269--296},
     year = {1969},
     volume = {180},
     url = {http://geodesic.mathdoc.fr/item/MAN_1969__180_161803/}
}