%0 Journal Article
%A Juris Steprans
%A Stephen Watson
%T Destroying precaliber $ℵ_1$: an application of a Δ-systems lemma for closed sets
%J Fundamenta Mathematicae
%D 1988
%P 223-229
%V 129
%N 3
%I mathdoc
%U http://geodesic.mathdoc.fr/articles/10.4064/fm-129-3-223-229/
%R 10.4064/fm-129-3-223-229
%G en
%F 10_4064_fm_129_3_223_229