REFERENCES
- Camillo , V. P. , Khurana , D. A. ( 2001 ). A characterization of unit regular rings . Comm. Algebra 29 : 2293 – 2295 . [CSA]
- Chen , H. ( 1997 ). Comparability of modules over regular rings . Comm. Algebra 25 : 3531 – 3543 . [CSA]
- Chen , H. ( 1999 ). Related comparability over exchange rings . Comm. Algebra 27 : 4209 – 4216 . [CSA]
- Chen , H. ( 2004 ). Extensions of unit-regular rings . Comm. Algebra 32 : 2359 – 2364 . [CROSSREF] [CSA]
- Goodearl , K. R. ( 1976 ). Direct sum properties of quasi-injective modules . Bull. Amer. Math. Soc. 82 : 108 – 110 . [CSA]
- Goodearl , K. R. ( 1979 ). von Neumann Regular Rings . London, San Francisco, Melbourne : Pitman .
- Nicholson , W. K. ( 1977 ). Lifting idempotents and exchange rings . Trans. Amer. Math. Soc. 229 : 269 – 278 . [CSA]
- Nicholson , W. K. ( 2001 ). Extensions of clean rings . Comm. Algebra 29 : 2589 – 2595 . [CROSSREF] [CSA]
- Nicholson , W. K. , Varadarjan , K. ( 1998 ). Countable linear transformations are clean . Proc. Amer. Math. Soc. 126 : 61 – 64 . [CROSSREF] [CSA]
- Nicholson , W. K. , Zhou , Y. ( 2004 ). Rings in which elements are uniquely the sum of an idempotent and a unit . Glasgow Math. J. 46 : 227 – 236 . [CROSSREF] [CSA]
- Communicated by E. Puczylowski.