Liouville integrability and superintegrability of a generalized   Lotka-Volterra system and its Kahan discretization
  We prove the Liouville and superintegrability of a generalized Lotka-Volterra system and its Kahan discretization. 
Theodoros E. Kouloukas, G. R. W. Quispel and Pol Vanhaecke
math-ph math.MP nlin.SI