%0 Journal Article %A Andrzej Grzegorczyk %T On the definitions of computable real continuous functions %J Fundamenta Mathematicae %D 1957 %P 61-71 %V 44 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/fm-44-1-61-71/ %R 10.4064/fm-44-1-61-71 %G en %F 10_4064_fm_44_1_61_71