REFERENCES
- Anderson , F. W. , Fuller , K. R. ( 1974 ). Rings and Categories of Modules . New York : Springer-Verlag .
- Bourbaki , N. ( 1980 ). Algèbre Homologique . Chapitre 10 . Paris : Masson .
- Cartan , H. , Eilenberg , S. ( 1956 ). Homological Algebra. Princeton University Press .
- Colby , R. R. ( 1975 ). Rings which have flat injective modules . J. Algebra 35 : 239 – 252 .
- Ding , N. Q. , Chen , J. L. ( 1993 ). The flat dimensions of injective modules . Manuscripts Math. 78 : 165 – 177 .
- Ding , N. Q. , Chen , J. L. ( 1996 ). Coherent rings with finite self-FP-injective dimension . Comm. Algebra 24 : 2963 – 2980 .
- Enochs , E. E. ( 1981 ). Injective and flat covers, envelopes and resolvents . Israel J. Math. 39 : 189 – 209 .
- Enochs , E. E. , Jenda , O. M. G. ( 1991 ). Copure injective modules . Quaest. Math. 14 : 401 – 409 .
- Enochs , E. E. , Jenda , O. M. G. ( 1993 ). Copure injective resolutions, flat resolvents and dimensions . Comment. Math. Univ. Carolinae 34 : 203 – 211 .
- Enochs , E. E. , Jenda , O. M. G. ( 2000 ). Relative Homological Algebra . de Gruyter Exp. Math . Vol. 30 . Berlin : de Gruyter .
- Enochs , E. E. , Jenda , O. M. G. , López-Ramos , J. A. ( 2004 ). The existence of Gorenstein flat covers . Math. Scand. 94 : 46 – 62 .
- Fieldhouse , D. J. ( 1972 ). Character modules, dimension and purity . Glasgow Math. J. 13 : 144 – 146 .
- Glaz , S. ( 1989 ). Commutative Coherent Rings . Lecture Notes in Math . Vol. 1371 . Berlin Heidelberg : Springer-Verlag .
- Maddox , B. H. ( 1967 ). Absolutely pure modules . Proc. Amer. Math. Soc. 18 : 155 – 158 .
- Mao , L. X. , Ding , N. Q. ( 2007 ). FI-injective and FI-flat modules . J. Algebra 309 : 367 – 385 .
- Mao , L. X. , Ding , N. Q. ( 2007 ). Envelopes and covers by modules of finite FP-injective and flat dimensions . Comm. Algebra 35 : 833 – 849 .
- Mao , L. X. , Ding , N. Q. ( 2008 ). Gorenstein FP-injective and Gorenstein flat modules . Journal of Algebra and Its Applications 7 : 491 – 506 .
- Pinzon , K. R. ( 2005 ). Absolutely Pure Modules. Thesis, University of Kentucky .
- Rotman , J. J. ( 1979 ). An Introduction to Homological Algebra . New York : Academic Press .
- Sazeedeh , R. ( 2004 ). Strongly torsion free, copure flat and Matlis reflexive modules . J. Pure Appl. Algebra 192 : 265 – 274 .
- Stenström , B. ( 1970 ). Coherent rings and FP-injective modules . J. London Math. Soc. 2 : 323 – 329 .
- Stenström , B. ( 1975 ). Rings of Quotients . Berlin, Heidelberg , New York : Springer-Verlag .
- Xu , J. Z. ( 1996 ). Flat Covers of Modules . Lecture Notes in Math . Vol. 1634 . Berlin : Springer-Verlag .
- Communicated by I. Shestakov.