1. Note on the open mapping theorem;Brown, Lawrence G.;Pacific J. Math.,1971
2. \bysame, Completeness, separability, metrizability, and extensions of topological groups (in preparation).
3. E. Čech, On bicompact spaces, Ann. of Math. 39 (1937), 823-844.
4. Generalizations of the 𝐺_{𝛿}-property of complete metric spaces;Frolík, Zdeněk;Czechoslovak Math. J.,1960
5. On the topoligical product of paracompact spaces;Frolík, Z.;Bull. Acad. Polon. Sci. S\'{e}r. Sci. Math. Astronom. Phys.,1960