1. Hopf Algebras;Abe,1980
2. The diamond lemma for ring theory;Bergman;Adv. Math.,1978
3. Non-standard quantum deformations of GL(n) and constant solutions of the Yang-Baxter equation;Demidov,1990
4. Quantum groups;Drin'feld,1986
5. Quantization of Lie groups and Lie algebras;Faddeev;Algebra i Analiz,1989