%0 Journal Article %A J. de Groot %T Continuous mappings of a certain family %J Fundamenta Mathematicae %D 1955 %P 203-206 %V 42 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/fm-42-1-203-206/ %R 10.4064/fm-42-1-203-206 %G en %F 10_4064_fm_42_1_203_206