Separation of variables for a lattice integrable system and the inverse   problem
  We investigate the relation between the local variables of a discrete integrable lattice system and the corresponding separation variables, derived from the associated spectral curve. In particular, we have shown how the inverse transformation from the separation variables to the discrete lattice variables may be factorised as a sequence of canonical transformations, following the procedure outlined by Kuznetsov. 
Supriya Mukherjee, A.Ghose Chowdhury, A.Roy Chowdhury