Classical R-matrix theory of dispersionless systems: II. (2+1)-dimension   theory
  A systematic way of construction of (2+1)-dimensional dispersionless integrable Hamiltonian systems is presented. The method is based on the so-called central extension procedure and classical R-matrix applied to the Poisson algebras of formal Laurent series. Results are illustrated with the known and new (2+1)-dimensional dispersionless systems. 
Maciej Blaszak and Blazej M. Szablikowski