1. Approximately invertible elements in non-unital normed algebras;Journal of Mathematical Analysis and Applications;2023-07
2. Real positivity and approximate identities in Banach algebras;Pacific Journal of Mathematics;2015-08-06
3. Unbounded approximate identities in normed algebras;Glasgow Mathematical Journal;1992-05
4. Spectra of approximate identities in Banach algebras;Mathematical Proceedings of the Cambridge Philosophical Society;1979-09
5. Cohen elements in Banach algebras;Proceedings of the Royal Society of Edinburgh: Section A Mathematics;1979