Hamiltonian formulation, nonintegrability and local bifurcations for the   Ostrovsky equation
  The Ostrovsky equation is a model for gravity waves propagating down a channel under the influence of Coriolis force. This equation is a modification of the famous Korteweg-de Vries equation and is also Hamiltonian. However the Ostrovsky equation is not integrable and in this contribution we prove its nonintegrability. We also study local bifurcations of its solitary waves. 
Roy Choudhury, Rossen I. Ivanov and Yue Liu