1. M. F.Atiyah and I. G.Macdonald, Introduction to Commutative Algebra. Reading, Mass. 1969.
2. L.Dornhoff, Group Representation Theory, Part B: Modular Representation Theory. New York 1972.
3. R.Gilmer, Multiplicative Ideal Theory. New York 1972.
4. K. W. Gruenberg, Cohomological Topics in Group Theory. LNM143, Berlin-New York 1970.
5. CBMS no. 25;K. W. Gruenberg,1976