[1] G. Choquet:
Une classe reguliere d'espaces de Baire. C. R. Acad. Paris, 260 (1958), 218 - 220.
MR 0092956 |
Zbl 0078.14903
[3] Z. Frolík:
Generalizations of the $G_\delta$-property of Complete Metric Spaces. Czechosl. Math. J. 10 (85), 1960, 359-379.
MR 0116305