@article{CMJ_2000__50_4_a13,
     author = {Nowik, Andrzej},
     title = {Some topological properties of $\omega$-covering sets},
     journal = {Czechoslovak Mathematical Journal},
     pages = {865--877},
     publisher = {mathdoc},
     volume = {50},
     number = {4},
     year = {2000},
     mrnumber = {1792976},
     zbl = {1079.03547},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CMJ_2000__50_4_a13/}
}