1. On the ubiquity of Gorenstein Rings;Bass;Math. Z.,1963
2. Elements of Mathematics: Commutative Algebra;Bourbaki,1972
3. Algebraic Curves: an Introduction to Algebraic Geometry;Fulton,1974
4. Introduction to Homological Methods in Commutative Rings;Geramita,1979
5. Der Kanonische Modul eines Cohen-Macaulay-Rings;Herzog,1967