%0 Journal Article %A Stasyuk, I. %A Tymchatyn, E. D. %T A continuous operator extending ultrametrics %J Commentationes Mathematicae Universitatis Carolinae %D 2009 %P 141-151 %V 50 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/CMUC_2009__50_1_a12/ %G en %F CMUC_2009__50_1_a12