%0 Journal Article %A Frolík, Zdeněk %T Generalizations of the $G_\delta$-property of complete metric spaces %J Czechoslovak Mathematical Journal %D 1960 %P 359-379 %V 10 %N 3 %U http://geodesic.mathdoc.fr/articles/10.21136/CMJ.1960.100420/ %R 10.21136/CMJ.1960.100420 %G en %F 10_21136_CMJ_1960_100420