1. Special Functions, A Group Theoretic Approach;Talman,1968
2. Representations of the Rotation and Lorentz Groups and their Applications;Gel’fand,1963
3. Some remarks on the theory of spherical functions on symmetric Riemannian manifolds;Berezin;Amer. Math. Soc. Transl.,1962
4. Topics in Harmonic Analysis on Homogeneous Spaces;Helgason,1981
5. Formula for the Casimir operator in the Iwasawa coördinates;Floyd;Tokyo J. Math.,1985