The differential-algebraic and bi-Hamiltonian integrability analysis of   the Riemann type hierarchy revisited
  A differential-algebraic approach to studying the Lax type integrability of the generalized Riemann type hydrodynamic hierarchy is revisited, its new Lax type representation and Poisson structures constructed in exact form. The related bi-Hamiltonian integrability and compatible Poissonian structures of the generalized Riemann type hierarchy are also discussed. 
Yarema A. Prykarpatsky, Orest D. Artemovych, Maxim V. Pavlov and   Anatoliy K. Prykarpatsky
nlin.SI math-ph math.MP