- Anderson , F.W. and Fuller , K.R. 1973 . Rings and categories of modules, Graduate Texts in Mathematics 13 , Vol. 79 , New York, Heidelberg—Berlin : Springer .
- D'este , G. 1992 . Simple submoduZes and multiplicities . Forum Math. , 4 : 1 – 11 .
- D'este , G. 1991 . Algebras with a large dual, Canadian Mathematical Society, . Society, Conference Proceedings, , 11 : 173 – 179 .
- Jacobson N. Basic Algebra II Freeman W.H. San Francisco C. 1984
- Jech , T. 1978 . “ Set Theory, ” . In Pure and applied math. , Vol. 79 , Academic Press .
- Kaplansky , I. 1969 . “ Fields and rings, ” . Chicago : University of Chicago Press, .
- Ringel C.M. Private comnication to the author.
- Rowen , L.H. 1988 . “ Ring Theory, ” . In Pure and applied math. , Vol. 127 , Academic Press .
Communications in Algebra
Volume 20, 1992 - Issue 12