L. C. Biedenharn and James D. Louck.Encyclopedia of mathematics and its applications.v.8,Mathematics of physics,Angular momentum in quantum physics: theory and application.Addison-Wesley Pub. Co.,1981.
Lawrence C. Biedenharn and James D. Louck.Encyclopedia of mathematics and its applications.v.9,Mathematics of physics,The Racah-Wigner algebra in quantum theory.Addison-Wesley Pub. Co.,1981.