[1] M. KATĚTOV:
On descriptive classes of functions. Theory of sets and topology (in honour of F. Hausdorff), pp. 265-278. Berlin 1972.
MR 0345060
[2] M. KATĚTOV:
On descriptive classification of functions. General Topology and its Relations to Modern Analysis and Algebra III (Proc. Prague Top. Symp. 1971), pp. 235-242. Prague 1972.
MR 0355956
[4] J. NAGATA:
Some theorems on generalized metric spaces. Theory of sets and topology (in honour of F. Hausdorff), pp. 377-390. Berlin 1972.
MR 0341425 |
Zbl 0277.54032