1. Hopf Algebras;Abe,1980
2. Enumeration of partitions. The role of Eulerian series and the q-orthogonal polynomials;Andrews,1977
3. The diamond lemma for ring theory;Bergman;Adv. in Math.,1978
4. Quantum groups;Drinfeld,1986
5. Quantization of Lie groups and Lie algebras;Faddeev,1988