Askey, R. Finite differences and orthogonal polynomials. (English) Zbl 0801.33005 Rend. Mat. Appl., VII. Ser. 14, No. 1, 135-144 (1994). Reviewer: M.Voit (Tübingen) MSC: 33C15 33D15 PDFBibTeX XMLCite \textit{R. Askey}, Rend. Mat. Appl., VII. Ser. 14, No. 1, 135--144 (1994; Zbl 0801.33005)
Lasser, Rupert Orthogonal polynomials and hypergroups. (English) Zbl 0538.33010 Rend. Mat. Appl., VII. Ser. 3, 185-209 (1983). Reviewer: Ch.Dunkl MSC: 33C45 43A10 PDFBibTeX XMLCite \textit{R. Lasser}, Rend. Mat. Appl., VII. Ser. 3, 185--209 (1983; Zbl 0538.33010)