%0 Journal Article
%A Krzysztof Mazur
%T $F_σ$-ideals and $ω_1 ω^*_1$-gaps in the Boolean algebras Ρ(ω)/I.
%J Fundamenta Mathematicae
%D 1991
%P 103-111
%V 138
%N 2
%I mathdoc
%U http://geodesic.mathdoc.fr/articles/10.4064/fm-138-2-103-111/
%R 10.4064/fm-138-2-103-111
%G en
%F 10_4064_fm_138_2_103_111