1. Aratyn K., van de Ler J.: An integrable structure based on the WDVV equations. Theor. Math. Phys. 134, 14–26 (2003)
2. Dickey, L.A.: Soliton Equations and Hamiltonian Systems, 2nd edn. Advanced Series in Mathematical Physics, vol. 26. World Scientific Publishing Co. Inc., River Edge (1986)
3. Drinfeld, V.G., Sokolov, V.V.: Lie algebras and equations of Korteweg-de Vries type. (Russian) Current problems in mathematics, vol. 24, pp. 81–180 (1984). Itogi Naukii Tekhniki, Akad. Nauk SSSR, Vsesoyuz. Inst. Nauchn. i Tekhn. Inform., Moscow
4. Pressley A., Segal G.B.: Loop Groups. Oxford Science Publ., Clarendon Press, Oxford (1986)
5. Terng C.L., Uhlenbeck K.: Poisson actions and scattering theory for integrable systems. Surv. Differ. Geom. 4, 315–402 (1999)