Voir la notice de l'article provenant de la source European Digital Mathematics Library
@article{MS2_1963__12_165842, author = {Richard Askey and I.I. Jr. Hirschman}, title = {Mean {Summability} for {Ultraspherical} {Polynomials.}}, journal = {Mathematica Scandinavica}, pages = {167--177}, publisher = {mathdoc}, volume = {12}, year = {1963}, zbl = {0132.29501}, url = {http://geodesic.mathdoc.fr/item/MS2_1963__12_165842/} }
Richard Askey; I.I. Jr. Hirschman. Mean Summability for Ultraspherical Polynomials.. Mathematica Scandinavica, Tome 12 (1963), pp. 167-177. http://geodesic.mathdoc.fr/item/MS2_1963__12_165842/