%0 Journal Article %A D. Bourgin %T Deformation and mapping theorems %J Fundamenta Mathematicae %D 1958 %P 285-303 %V 46 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/fm-46-3-285-303/ %R 10.4064/fm-46-3-285-303 %G en %F 10_4064_fm_46_3_285_303