1. On the ubiquity of Gorenstein rings;Bass, Hyman;Math. Z.,1963
2. Lecture Notes in Mathematics, Vol. 238,1971
3. Stable ideals and Arf rings;Lipman, Joseph;Amer. J. Math.,1971
4. Interscience Tracts in Pure and Applied Mathematics, No. 13;Nagata, Masayoshi,1962
5. 5. D. Rees, Estimates for the minimum number of generators of modules over Cohen- Macaulay local rings (preprint).