%0 Journal Article %A M. Rudelson %T A characterization of 2-trivial Banach spaces with unconditional basis %J Zapiski Nauchnykh Seminarov POMI %D 1987 %P 76-87 %V 157 %I mathdoc %U http://geodesic.mathdoc.fr/item/ZNSL_1987_157_a6/ %G ru %F ZNSL_1987_157_a6