1. Topics in the algebra of βS;Adams;Ph.D. Dissertation, Hull University,2001
2. Ideals in the Stone-Čech compactification of noncommutative semigroups;Anthony;Ph.D. Dissertation, Howard University,1994
3. The smallest ideals in the two natural products on βS;Anthony;Semigroup Forum,1994
4. κ-topologies for right topological semigroups;Baker,1992
5. Elements of finite order in Stone-Čech compactifications;Baker,1992