%0 Journal Article %A Jussi Ketonen %T Ultrafilters over measurable cardinals %J Fundamenta Mathematicae %D 1972 %P 257-269 %V 77 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/fm-77-3-257-269/ %R 10.4064/fm-77-3-257-269 %G en %F 10_4064_fm_77_3_257_269