1. Mappings and spaces;Arhangel'skiǐ;Russian Math. Surv.,1966
2. Helly's theorem and its relatives;Danzer;AMS Proc. Symp. Pure Math.,1963
3. An isomorphism principle in general topology;de Groot;Bull. Am. Math. Soc.,1967
4. Wann sind alle stetigen Abbildungen in Y konstant;Herrlich;Math. Z.,1965
5. Structures in topology;Harris;Mem. Ann. Math. Soc.,1971