On a Hamiltonian form of an elliptic spin Ruijsenaars-Schneider system
  An explicit expression of a Hamiltonian form of an elliptic spin Ruijsenaars-Schneider is found in the case of 2 particles using Krichever-Phong's universal symplectic form. In the rational limit it coincides with a Poisson bracket found by Arutyunov and Frolov. 
Fedor Soloviev