@article{bwmeta1.element.bwnjournal-article-fmv58i1p23bwm,
author = {Stephen Willard},
title = {Absolute Borel sets in their Stone-\v Cech compactifications},
journal = {Fundamenta Mathematicae},
volume = {58},
year = {1966},
pages = {323-333},
zbl = {0145.19505},
language = {en},
url = {http://dml.mathdoc.fr/item/bwmeta1.element.bwnjournal-article-fmv58i1p23bwm}
}
Willard, Stephen. Absolute Borel sets in their Stone-Čech compactifications. Fundamenta Mathematicae, Tome 58 (1966) pp. 323-333. http://gdmltest.u-ga.fr/item/bwmeta1.element.bwnjournal-article-fmv58i1p23bwm/