@article{CMUC_2004__45_4_a13,
     author = {Simon, Petr},
     title = {On the existence of true uniform ultrafilters},
     journal = {Commentationes Mathematicae Universitatis Carolinae},
     pages = {739--741},
     publisher = {mathdoc},
     volume = {45},
     number = {4},
     year = {2004},
     mrnumber = {2103088},
     zbl = {1099.54006},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CMUC_2004__45_4_a13/}
}