1. Mappings and spaces;Arhangel'skiî;Russian Math. Surveys,1966
2. On relative countably compactness;Balogh;Uspekhi Math. Nauk,1979
3. On stratifiable spaces;Borges;Pacific J. Math.,1966
4. On p-spaces and wΔ-spaces;Burke;Pacific J. Math.,1970
5. On a theorem of V. V. Filippov;Burke;Israel J. Math,1972