[A] Arhangelskij A. V.:
The conditions for the preservation of metrizability in quotient mappings. (Russian), Doklady Akad. Nauk SSSR 164 (1965) 9-12.
MR 0187201
[C] Čech E.:
Topological spaces. (revised edition by Z. Frolík, M. Katětov), Academia Prague 1966.
MR 0211373
[DR] Roelcke W., Dierolf S.:
Uniform structures on topological groups and their quotients. McGraw-Hill Co. New York 1981.
MR 0644485 |
Zbl 0489.22001
[He] Hechler S. H.:
On the existence of certain cofinal subsets of ${}^{\omega }\omega $. Proc. Symp. Pure Math. 13. II. Los Angeles 1967 Amer. Math. Soc. Providence 1974, 155-173.
MR 0360266
[Hi] Himmelberg C. J.:
Quotient uniformities and uniformly pseudoopen maps. Bull. Inst. Math. Acad. Sinica 2 (1974) 357-369.
MR 0358717