참고문헌
- Israel J. Math. v.63 The structure of injective covers of special modules T. Cheatham;E. Enochs;O. Jenda
- Israel J. Math. v.39 Injective and flat covers envelopes and resolvents E. Enochs
- Arch. Math. v.51 The dual of the grade of a module O. Jenda
- to appear in Comm. Algebra S-torsion free covers of modules H. Kim;Y.S. Park;Y.M. Song
- J. London Math. Soc. v.68 Injective envelopes and inverse polynomials D. Northcott
- An introduction to Homological Algebra J. Rotman
- J. Algebra v.134 Stable equivalence of self-injective algevras and a generalization of tilting modules T. Wakamatsu
- Proc. Amer. Math. Soc. v.69 Ring extensions and essential monomorphisms T. Wurful
- Lecture Notes in Math. Flat covers of modules J. Xu