1. Descriptive set theory and topology;Choban,1995
2. General Topology;Engelking,1989
3. First class functions with values in nonseparable spaces;Hansell,1991
4. Descriptive topology;Hansell,1992
5. On the nonseparable theory of Borel and Souslin sets;Hansell;Bull. Amer. Math. Soc.,1972