1. Joos, H.: Fortschr. Physik10, 65 (1962).
2. Rose, M. E.: Elementary theory of angular momentum, Chap. IV, V. New York: John Wiley and Sons 1957.
3. Erdelyi, A.: Bateman manuscript project. Higher transcendental functions. Vol. I, p. 175. London, Toronto, New York: McGraw-Hill Book Company, Inc. 1953.
4. Racah, G.: Phys. Rev.62, 438 (1942).
5. Domokos, G.: Phys. Rev.159, 1387 (1967);Freedman, D. Z., andWang, J. M.: Phys. Rev.160, 1560 (1967).