%0 Journal Article %A Sorin Popa %T Markov traces on universal Jones algebras and subfactors of finite index. %J Inventiones mathematicae %D 1993 %P 375-406 %V 111 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/IM_1993__111_1_144083/ %F IM_1993__111_1_144083