“…A. Wilson, M. Ismail [14,15,16,17]; F. Nikiforov, K. Suslov, B. Uvarov, N. M. Atakishiyev [8,9,10,18,19,20]; G. George, M. Rahman [21]; T. H. Koornwinder [22]; and many other researchers like R. Álvarez-Nodarse, K. L. Cardoso, I. Area, E. Godoy, A. Ronveaux, A. Zarzo, W. Robin, T. Dreyfus, V. Kac, P. Cheung, and L. K. Jia, J. F. Cheng, Z.S, Feng [23][24][25][26][27][28][29][30][31][32].…”