1. Rings and Categories of Modules;Anderson,1992
2. Introduction to Commutative Algebra;Atiyah,1969
3. On fast multiplication of polynomials over arbitrary algebras;Cantor;Acta Inform.,1991
4. Free Rings and Their Relations;Cohn,1985
5. Giesbrecht's algorithm, the HFE cryptosystem and Ore's ps-polynomials;Coulter,2001