%0 Journal Article %A B.A. Kupershmidt %A George Wilson %T Modifying Lax Equations and the Second Hamiltonian Structure. %J Inventiones mathematicae %D 1980 %P 403-436 %V 62 %I mathdoc %U http://geodesic.mathdoc.fr/item/IM_1980__62_142781/ %F IM_1980__62_142781