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Clifford algebra derivations of tau-functions for two-dimensional integrable models with positive and negative flows. Aratyn, Henrik, van de Leur, Johan (2007) SIGMA. Symmetry, Integrability and Geometry: Methods and Applications [electronic only]
Completely Integrable Hamiltonian Systems Connected with Semisimple Lie Algebras. M.A. Olshanetsky, A.M. perelomov (1976) Inventiones mathematicae
Coordinate Bethe ansatz for spin s XXX model. Crampé, Nicolas, Ragoucy, Eric, Alonzi, Ludovic (2011) SIGMA. Symmetry, Integrability and Geometry: Methods and Applications [electronic only]