%0 Journal Article %A Andrzej Grzegorczyk %T An unfinitizability proof by means of restricted reduced power %J Fundamenta Mathematicae %D 1971 %P 37-49 %V 73 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/fm-73-1-37-49/ %R 10.4064/fm-73-1-37-49 %G en %F 10_4064_fm_73_1_37_49