@article{bwmeta1.element.bwnjournal-article-fmv57i1p5bwm,
author = {R. Heath},
title = {On open mappings and certain spaces satisfying the first countability axiom},
journal = {Fundamenta Mathematicae},
volume = {57},
year = {1965},
pages = {91-96},
zbl = {0134.41802},
language = {en},
url = {http://dml.mathdoc.fr/item/bwmeta1.element.bwnjournal-article-fmv57i1p5bwm}
}
Heath, R. On open mappings and certain spaces satisfying the first countability axiom. Fundamenta Mathematicae, Tome 57 (1965) pp. 91-96. http://gdmltest.u-ga.fr/item/bwmeta1.element.bwnjournal-article-fmv57i1p5bwm/