1. Integral Representations for Spatial Models of Mathematical Physics;Kravchenko,1996
2. Special Functions and their Applications;Lebedev,1972
3. Special Functions for Scientists and Engineers;Bell,1968
4. E. Hobson, The Theory of Spherical and Ellipsoidal Harmonics. Cambridge, 1931.
5. Spheroidal wave functions: their use and evaluation;Baier;J. Acoust. Soc. Am.,1970