1. L. C. Andrews, Special functions of mathematics for engineers, McGraw-Hill, Inc., New York, second edition, 1992.
2. G. E. Andrews, R. Askey, R. Roy, Special functions, Cambridge University Press, 71, Cambridge, 1999.
3. G. E. Andrews, $q$-hypergeometric and related functions, NIST handbook of mathematical functions, U.S. Dept. Commerce, Washington DC, 2010,419-433.
4. P. Appell, J. K. De Fériet, Fonctions hypergéométriques et hypersphériques: polynomes d'Hermite, Gauthier-Villars, 1926.
5. R. Askey, The $q$-Gamma and $q$-Beta functions, Appl. Anal., 8 (1978), 125-141.