@article{CMUC_2004__45_1_a12,
     author = {Ying, Ge},
     title = {Spaces with countable $sn$-networks},
     journal = {Commentationes Mathematicae Universitatis Carolinae},
     pages = {169--176},
     publisher = {mathdoc},
     volume = {45},
     number = {1},
     year = {2004},
     mrnumber = {2076868},
     zbl = {1098.54025},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CMUC_2004__45_1_a12/}
}