%0 Journal Article %A Saharon Shelah %T Covering of the null ideal may have countable cofinality %J Fundamenta Mathematicae %D 2000 %P 109-136 %V 166 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/fm-166-1-2-109-136/ %R 10.4064/fm-166-1-2-109-136 %G en %F 10_4064_fm_166_1_2_109_136