1. Bernstein, I.N., Gelfand, I.M., Gelfand, S.I.: Differential operators on a cubic cone. Uspehi Mat. Nauk 27(1), 185–190 (1972)
2. Graduate Texts in Mathematics;D. Eisenbud,1995
3. Fitting, H.: Die Determinantenideale Eines Moduls. Jahrbericht der Deutschen Math.-Vereinigung 46, 195–229 (1936)
4. Matsumura, H.: Commutative Ring Theory. Cambridge University Press, Cambridge (1989)
5. Graduate Studies in Mathematics;J.C. McConnell,2001