%0 Journal Article %A Bernd Carl %A Alain Pajor %T Gelfand numbers of operators with values in a Hilbert space. %J Inventiones mathematicae %D 1988 %P 479-504 %V 94 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/IM_1988__94_2_143634/ %F IM_1988__94_2_143634