@article{AUCMP_2004_45_2_a9,
     author = {Simon, Petr},
     title = {An upper bound for countably splitting number},
     journal = {Acta Universitatis Carolinae. Mathematica et Physica},
     pages = {81--82},
     year = {2004},
     volume = {45},
     number = {2},
     mrnumber = {2138279},
     zbl = {1065.03032},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/AUCMP_2004_45_2_a9/}
}