@article{bwmeta1.element.bwnjournal-article-fmv89i1p23bwm,
author = {P. Doyle},
title = {A topological collapse number for all spaces},
journal = {Fundamenta Mathematicae},
volume = {89},
year = {1975},
pages = {261-263},
zbl = {0317.57008},
language = {en},
url = {http://dml.mathdoc.fr/item/bwmeta1.element.bwnjournal-article-fmv89i1p23bwm}
}
Doyle, P. A topological collapse number for all spaces. Fundamenta Mathematicae, Tome 89 (1975) pp. 261-263. http://gdmltest.u-ga.fr/item/bwmeta1.element.bwnjournal-article-fmv89i1p23bwm/