[1] Creede G D. Concerning semi-stratifiable spaces. Pacific Journal of Math, 1970, 32(1): 47--54

[2]  artin H. Metrizability of M-spaces. Can J Math, 1973, 4: 840--841

[3] Martin H. Metrizability and submetrization of topological spaces[D]. Pittsburgh, PA: University of Pittsburgh, 1973
[4]  Mohamad A. A note on developability and metrizability. New Zealand J Math, 2003, 32: 67--71

[5] Bennett H, Byerly R, Lutzer D. Compact G_δ sets. Topology Appl, 2006, 153: 2169--2181

[6] Hodel R E. Moore spaces and ωΔ-spaces. Pacific J Math, 1971, 38: 641--652

[7] Good C, Knight R, Stares I. Monotone countable paracompactness. Topology Appl, 2000, 101(3): 281--298

[8] 彭良雪, 林寿. 单调空间与度量化定理. 数学学报, 2003, 46(6): 1225--1232

[9] 林寿. 广义度量空间与映射. 北京: 科学出版社, 2007

[10] Gruenhage G. Generalized Metric Spaces. In Handbook of Set-theoretic Topology. Asterdam: North-Holland,  1984

[11] 高国士. 拓扑空间论. 北京: 科学出版社, 2000