1. Regular centralizers of idempotent transformations;Semigroup Forum;2010-11-18
2. Finite semilattices whose non-invertible endomorphisms are products of idempotents;Proceedings of the Royal Society of Edinburgh: Section A Mathematics;1994
3. Continuous nilpotents on topological spaces;Journal of the Australian Mathematical Society. Series A. Pure Mathematics and Statistics;1987-08
4. A survey of semigroups of continuous selfmaps;Semigroup Forum;1975-12
5. Products of idempotents in certain semigroups of transformations;Proceedings of the Edinburgh Mathematical Society;1971-06