1. LordRayleigh (J. W. Strutt):Sci. Pap.,6, 1, 444 (1920). See also p. 502 of ref. (4).
2. S. Flugge:Practical Quantum Mechanics (Springer-Verlag, Berlin, 1974).
3. A. Bohr andB. Mottelson:Nuclear Structure, Vol.2 (Benjamin, New York, N.Y., 1975).
4. G. N. Watson:A Treatise on the Theory of Bessel Functions, 2nd edition (Cambridge University Press, Cambridge, 1966).
5. F. W. J. Olver:Introduction to Asymptotics and Special Functions (Academic Press, New York, N.Y., 1974).