%0 Journal Article %A Protasov, I. V. %T Topologies on groups determined by right cancellable ultrafilters %J Commentationes Mathematicae Universitatis Carolinae %D 2009 %P 135-139 %V 50 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/CMUC_2009__50_1_a11/ %G en %F CMUC_2009__50_1_a11