1. Rings and Categories of Modules;Anderson,1992
2. Quantization, orbifold cohomology, and Cherednik algebras;Etingof,2006
3. Crossed products: Characters, cyclic homology, and Grothendieck groups;Lorenz,1992
4. Multiplicative Invariant Theory;Lorenz,2005
5. Fixed Rings of Finite Automorphism Groups of Associative Rings;Montgomery,1980