@article{ZNSL_1981_109_a6,
     author = {L. A. Takhtadzhyan and L. D. Faddeev},
     title = {Spectrum and scattering of excitations in the one-dimensional isotropic {Heisenberg} model},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {134--178},
     publisher = {mathdoc},
     volume = {109},
     year = {1981},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_1981_109_a6/}
}