%0 Journal Article %A Niels Nielsen %T Components and open mapping theorems %J Studia Mathematica %D 1970 %P 277-287 %V 37 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/sm-37-3-277-287/ %R 10.4064/sm-37-3-277-287 %G en %F 10_4064_sm_37_3_277_287