@article{105266,
author = {Jaroslav Zem\'anek},
title = {Nowhere dense set which is finitely open},
journal = {Commentationes Mathematicae Universitatis Carolinae},
volume = {011},
year = {1970},
pages = {83-89},
zbl = {0195.40904},
mrnumber = {0261329},
language = {en},
url = {http://dml.mathdoc.fr/item/105266}
}
Zemánek, Jaroslav. Nowhere dense set which is finitely open. Commentationes Mathematicae Universitatis Carolinae, Tome 011 (1970) pp. 83-89. http://gdmltest.u-ga.fr/item/105266/
Functional Analysis and Semigroups, Providence 1957. (1957)