1. Arik, M., and Coon, D. (1976).Journal of Mathematical Physics,17, 524.
2. Baxter, R. (1982).Exactly Solved Models in Statistical Mechanics, Academic Press, New York.
3. Biedenharn, L. (1989).Journal of Physics A,22, L873.
4. Bogoliubov, N., Izergin, A., and Korepin, V. (1985). InSpringer Lecture Notes in Physics, Vol. 242, Springer, Berlin, p. 220.
5. Bracken, A., McAnally, D., Zhang, R., and Gould, M. (1991).Journal of Physics A,24, 1379.