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@article{PORMA_1971__30_1_115131, author = {Joshi, C.M.}, title = {An operational formula involving the associated ultraspherical polynomials}, journal = {Portugaliae mathematica}, pages = {1--9}, publisher = {mathdoc}, volume = {30}, number = {1}, year = {1971}, mrnumber = {0304728}, zbl = {0223.33014}, language = {en}, url = {http://geodesic.mathdoc.fr/item/PORMA_1971__30_1_115131/} }
Joshi, C.M. An operational formula involving the associated ultraspherical polynomials. Portugaliae mathematica, Tome 30 (1971) no. 1, pp. 1-9. http://geodesic.mathdoc.fr/item/PORMA_1971__30_1_115131/