@article{10_21136_CMJ_1960_100420,
     author = {Frol{\'\i}k, Zden\v{e}k},
     title = {Generalizations of the $G_\delta$-property of complete metric spaces},
     journal = {Czechoslovak Mathematical Journal},
     pages = {359--379},
     year = {1960},
     volume = {10},
     number = {3},
     doi = {10.21136/CMJ.1960.100420},
     mrnumber = {0116305},
     zbl = {0100.18701},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/CMJ.1960.100420/}
}