%0 Journal Article %A Zhang, Dexue %T Tower extension of topological constructs %J Commentationes Mathematicae Universitatis Carolinae %D 2000 %P 41-51 %V 41 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/CMUC_2000__41_1_a3/ %G en %F CMUC_2000__41_1_a3