TY  - JOUR
AU  - Frolík, Zdeněk
TI  - On $G_\delta$-spaces
JO  - Czechoslovak Mathematical Journal
PY  - 1959
SP  - 63
EP  - 65
VL  - 09
IS  - 1
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/articles/10.21136/CMJ.1959.100340/
DO  - 10.21136/CMJ.1959.100340
LA  - en
ID  - 10_21136_CMJ_1959_100340
ER  -