%0 Journal Article %A Hsiang, Fu Cheng %T On Riesz summability of subsequences %J Portugaliae mathematica %D 1965 %P 155-161 %V 24 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/PORMA_1965__24_3_114961/ %G en %F PORMA_1965__24_3_114961