%0 Journal Article %A J. Wierzejewski %T On stability and products %J Fundamenta Mathematicae %D 1976 %P 81-95 %V 93 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/fm-93-2-81-95/ %R 10.4064/fm-93-2-81-95 %G en %F 10_4064_fm_93_2_81_95