1. DinA.M., Lett. Math. Phys. 5, 207 (1981).
2. SzegöG., Orthogonal Polynomials, Amer. Math. Soc., Providence, RI, 1975, problem 84.
3. ErdélyiA. et al., Higher Transcendental Functions, Vol. 1 McGraw Hill, New York, 1953 (3.12 (13)).
4. Szegö, G., opcit. (4.9.16).
5. ibid. (4.10.27).