1. Weak P-points and Cancellation in ?S;Annals of the New York Academy of Sciences;1996-12
2. Minimal ideals in group algebras and their biduals;Mathematical Proceedings of the Cambridge Philosophical Society;1996-10
3. Subsemigroups of Stone-Čech compactifications;Mathematical Proceedings of the Cambridge Philosophical Society;1994-07
4. Compact left ideal groups in semigroup compactification of locally compact groups;Mathematical Proceedings of the Cambridge Philosophical Society;1993-05
5. Elements of finite order in Stone-Čech compactifications;Proceedings of the Edinburgh Mathematical Society;1993-02