@article{bwmeta1.element.bwnjournal-article-fmv129i1p20bwm,
author = {Juris Steprans and Stephen Watson},
title = {Destroying precaliber $\_1$: an application of a D-systems lemma for closed sets},
journal = {Fundamenta Mathematicae},
volume = {131},
year = {1988},
pages = {223-229},
zbl = {0657.03034},
language = {en},
url = {http://dml.mathdoc.fr/item/bwmeta1.element.bwnjournal-article-fmv129i1p20bwm}
}
Steprans, Juris; Watson, Stephen. Destroying precaliber $ℵ_1$: an application of a Δ-systems lemma for closed sets. Fundamenta Mathematicae, Tome 131 (1988) pp. 223-229. http://gdmltest.u-ga.fr/item/bwmeta1.element.bwnjournal-article-fmv129i1p20bwm/