Ge. Arutyunov, CONSTRUCTION OF TRIGONOMETRIC TODA R-MATRICES VIA A HAMILTONIAN REDUCTION OF THE COTANGENT BUNDLE OVER LOOP-GROUPS, Theoretical and mathematical physics, 113(1), 1997, pp. 1209-1216
It is shown how the classical trigonometric tau-matrices of the Toda m
odel can be obtained by a Hamiltonian reduction of the cotangent bundl
e over loop groups.