%0 Journal Article %A Andrzej Mostowski %T Contributions to the theory of definable sets and functions %J Fundamenta Mathematicae %D 1955 %P 271-275 %V 42 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/fm-42-2-271-275/ %R 10.4064/fm-42-2-271-275 %G en %F 10_4064_fm_42_2_271_275