1. Hopf Algebras;Abe,1980
2. A coassociative C*-quantum group with nonintegral dimensions;Böhm;Lett. Math. Phys.,1996
3. G. Böhm, F. Nill, and K. Szlachányi, Weak Hopf Algebras. II. Representation Theory, Dimensions, and the Markov Trace, Math. QA/9906045.
4. Representation Theory of Finite Groups and Associative Algebras;Curtis,1962
5. Methods of Representation Theory;Curtis,1980