Orthogonal polynomials. - Tom H. Koornwinder; Roderick S. C. Wong; Roelof Koekoek; Rene F. Swarttouw (NIST Handbook of Mathematical Functions, 2010)

Asymptotic approximations. - Frank W. J. Olver; Roderick S. C. Wong (NIST Handbook of Mathematical Functions, 2010)

Algebraic and analytic methods. - Ranjan Roy; Frank W. J. Olver; Richard A. Askey; Roderick S. C. Wong (NIST Handbook of Mathematical Functions, 2010)