@article{CMUC_2011__52_3_a9,
     author = {Silva, Samuel Gomes da},
     title = {Closed discrete subsets of separable spaces and relative versions of normality, countable paracompactness and property $(a)$},
     journal = {Commentationes Mathematicae Universitatis Carolinae},
     pages = {435--444},
     publisher = {mathdoc},
     volume = {52},
     number = {3},
     year = {2011},
     mrnumber = {2843235},
     zbl = {1249.54012},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CMUC_2011__52_3_a9/}
}