%0 Journal Article %A Bohdan Aniszczyk %A Ryszard Frankiewicz %T On minimal generators of σ-fields %J Fundamenta Mathematicae %D 1984 %P 131-134 %V 124 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/fm-124-2-131-134/ %R 10.4064/fm-124-2-131-134 %G en %F 10_4064_fm_124_2_131_134