REFERENCES
- Anderson , F. W. , Fuller , K. R. ( 1992 ). Rings and Categories of Modules . Berlin, New York : Springer-Verlag .
- Facchini , A. ( 1998 ). Module Theory. Endomorphism Rings and Direct Sum Decompositions in Some Classes of Modules . Progress in Mathematics 167 . Basel : Birkhäuser Verlag .
- Lam , T. Y. ( 1998 ). Lectures on Modules and Rings . Berlin, New York : Springer-Verlag .
- Nicholson , W. K. , Yousif , M. F. ( 2001 ). On Quasi-Frobenius rings . In: et al. ., eds. International Symposium on Ring Theory . Birkhäuser , pp. 245 – 277 .
- Nicholson , W. K. , Yousif , M. F. ( 2003 ). Quasi-Frobenius Rings . Cambridge Tracts in Mathematics, 158 . Cambridge : Cambridge University Press .
- Communicated by I. Swanson.