@article{CMUC_2009__50_1_a11,
     author = {Protasov, I. V.},
     title = {Topologies on groups determined by right cancellable ultrafilters},
     journal = {Commentationes Mathematicae Universitatis Carolinae},
     pages = {135--139},
     publisher = {mathdoc},
     volume = {50},
     number = {1},
     year = {2009},
     mrnumber = {2562810},
     zbl = {1212.54101},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CMUC_2009__50_1_a11/}
}