%0 Journal Article %A Earl Berkson %T Marcinkiewicz multipliers of higher variation and summability of operator-valued Fourier series %J Studia Mathematica %D 2014 %P 123 %V 222 %N 2 %I mathdoc %U https://geodesic-test.mathdoc.fr/item/STUMA_2014__222_2_286621/ %G en %F STUMA_2014__222_2_286621