1. Andrews, G.E., Askey, R., and Roy, R. (1999). Encyclopedia of Mathematics and Its Applications, 71, Cambridge University Press.
2. Olver, F.W.J., Daalhuis, A.B.O., Lozier, D.W., Schneider, B.I., Boisvert, R.F., Clark, C.W., Miller, B.R., Saunders, B.V., Cohl, H.S., and McClain, M.A. (2023, June 28). NIST Digital Library of Mathematical Functions, Available online: https://dlmf.nist.gov/.
3. Gasper, G. (1989). Topics in Mathematical Analysis, World Scientific Publishing.
4. Gasper, G., and Rahman, M. (2004). Encyclopedia of Mathematics and Its Applications, Cambridge University Press. [2nd ed.].
5. On the Laguerre-Hahn intertwining operator and application to connection formulae;Sfaxi;Acta Appl. Math.,2011