%0 Journal Article %A William Connett %A Alan Schwartz %T A multiplier theorem for ultraspherical series %J Studia Mathematica %D 1974 %P 51-70 %V 51 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/sm-51-1-51-70/ %R 10.4064/sm-51-1-51-70 %G en %F 10_4064_sm_51_1_51_70