%0 Journal Article %A K. Barwise %T Mostowski's collapsing function and the closed unbounded filter %J Fundamenta Mathematicae %D 1974 %P 95-103 %V 82 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/fm-82-2-95-103/ %R 10.4064/fm-82-2-95-103 %G en %F 10_4064_fm_82_2_95_103