1. On strongly π-regular rings and homomorphisms into them;Burgess;Comm. Algebra,1988
2. A characterization of unit regular rings;Camillo;Comm. Algebra,2001
3. Exchange rings, units and idempotents;Camillo;Comm. Algebra,1994
4. J. Chen, X. Yang, Y. Zhou, On strongly clean matrix and triangular matrix rings, preprint, 2005
5. Sur les anneaux fortement π-réguliers;Dischinger;C. R. Acad. Sci. Paris Sér. A,1976