%0 Journal Article %A L. A. Takhtadzhyan %A L. D. Faddeev %T Spectrum and scattering of excitations in the one-dimensional isotropic Heisenberg model %J Zapiski Nauchnykh Seminarov POMI %D 1981 %P 134-178 %V 109 %I mathdoc %U http://geodesic.mathdoc.fr/item/ZNSL_1981_109_a6/ %G ru %F ZNSL_1981_109_a6