TY - JOUR AU - Silva, Samuel Gomes da TI - Closed discrete subsets of separable spaces and relative versions of normality, countable paracompactness and property $(a)$ JO - Commentationes Mathematicae Universitatis Carolinae PY - 2011 SP - 435 EP - 444 VL - 52 IS - 3 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/CMUC_2011__52_3_a9/ LA - en ID - CMUC_2011__52_3_a9 ER -