TY - JOUR AU - Protasov, I. V. TI - Topologies on groups determined by right cancellable ultrafilters JO - Commentationes Mathematicae Universitatis Carolinae PY - 2009 SP - 135 EP - 139 VL - 50 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/CMUC_2009__50_1_a11/ LA - en ID - CMUC_2009__50_1_a11 ER -