%0 Journal Article %A Marek Balcerzak %T On c-sets and products of ideals %J Colloquium Mathematicum %D 1991 %P 1-6 %V 62 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/cm-62-1-1-6/ %R 10.4064/cm-62-1-1-6 %G en %F 10_4064_cm_62_1_1_6