%0 Journal Article %A Andrzej Mostowski %A Y. Suzuki %T On ω-models which are not β-models %J Fundamenta Mathematicae %D 1969 %P 83-93 %V 65 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/fm-65-1-83-93/ %R 10.4064/fm-65-1-83-93 %G en %F 10_4064_fm_65_1_83_93