@article{bwmeta1.element.bwnjournal-article-fmv131i1p119bwm,
author = {Jan Pelant and Petr Simon and Jerry Vaughan},
title = {The smallest number of free closed filters},
journal = {Fundamenta Mathematicae},
volume = {131},
year = {1988},
pages = {215-221},
zbl = {0669.54001},
language = {en},
url = {http://dml.mathdoc.fr/item/bwmeta1.element.bwnjournal-article-fmv131i1p119bwm}
}
Pelant, Jan; Simon, Petr; Vaughan, Jerry. The smallest number of free closed filters. Fundamenta Mathematicae, Tome 131 (1988) pp. 215-221. http://gdmltest.u-ga.fr/item/bwmeta1.element.bwnjournal-article-fmv131i1p119bwm/