1. [A] Abe, E.: Hopf algebras. Cambridge Tracts in Mathematics74, Cambridge: Cambridge University Press, 1980
2. [B] Bion-Nadal, J.: An example of a subfactor of the hyperfinite II1 factor whose principal graph invariant is the Coxeter graphE 6. In: Current Topics in Operator Algebras, Nara 1990, Singapore: World Scientific 1991, pp. 104–113
3. [D] Drinfeld, V.G.: Quantum groups. ICM Proceedings, New York: Berkeley 1986, pp. 798–820
4. MSRI Publications;F. Goodman,1989
5. [H1] Hayashi, T.: An algebra related to the fusion rules of Wess-Zumino-Witten models. Lett. Math. Phys.22, 291–296 (1991)