%0 Journal Article %A Tang, Shen-Chi %T A theorem on Riesz summability $(R,\omega , 2)$ on Banach space %J Compositio Mathematica %D 1965-1966 %P 167-171 %V 17 %I Kraus Reprint %U http://www.numdam.org/item/CM_1965-1966__17__167_0/ %G en %F CM_1965-1966__17__167_0