Voir la notice de l'article provenant de la source Czech Digital Mathematics Library
@article{CMUC_1970__11_1_a5, author = {Zem\'anek, Jaroslav}, title = {Nowhere dense set which is finitely open}, journal = {Commentationes Mathematicae Universitatis Carolinae}, pages = {83--89}, publisher = {mathdoc}, volume = {11}, number = {1}, year = {1970}, mrnumber = {0261329}, zbl = {0195.40904}, language = {en}, url = {http://geodesic.mathdoc.fr/item/CMUC_1970__11_1_a5/} }
Zemánek, Jaroslav. Nowhere dense set which is finitely open. Commentationes Mathematicae Universitatis Carolinae, Tome 11 (1970) no. 1, pp. 83-89. http://geodesic.mathdoc.fr/item/CMUC_1970__11_1_a5/