1. Bancerek, G.: Reduction Relations; Formalized Mathematics (1995), available in JFM from [Miz05]
2. Bancerek, G.: On the Structure of Mizar Types. In: Geuvers, H., Kamareddine, F. (eds.) Proc. of MLC 2003. ENTCS, vol. 85(7) (2003)
3. Becker, T., Weispfenning, V.: Gröbner Bases — A Computational Approach to Commutative Algebra. Springer, Heidelberg (1993)
4. Backer, J., Rudnicki, P., Schwarzweller, C.: Ring Ideals; Formalized Mathematics (2000), available in JFM from [Miz05]
5. Lecture Notes in Computer Science;B. Buchberger,1979