1. Mappings and spaces;Arhangel′skiĭ, A. V.;Russian Math. Surveys,1966
2. On stratifiable spaces;Borges, Carlos J. R.;Pacific J. Math.,1966
3. Some generalizations of metric spaces;Ceder, Jack G.;Pacific J. Math.,1961
4. G. Creede, Semi-stratifiable spaces, Topology Conference, Arizona State University, Temple, Arizona, 1967, pp. 318-324.
5. Feathery paracompacta;Filippov, V. V.;Dokl. Akad. Nauk SSSR,1968