1. Topological Groups and Related Structures;Arhangel'skiı̌,2008
2. A countable connected Hausdorff space;Brown;Bull. Am. Math. Soc.,1953
3. Proper pseudocompact extensions of compact Abelian group topologies;Comfort;Proc. Am. Math. Soc.,1982
4. Extremal phenomena in certain classes of totally bounded groups;Comfort;Diss. Math.,1988