An integrable (2+1)-dimensional Camassa-Holm hierarchy with peakon   solutions
  In this letter, we propose a (2+1)-dimensional generalized Camassa-Holm (2dgCH) hierarchy with both quadratic and cubic nonlinearity. The Lax representation and peakon solutions for the 2dgCH system are derived. 
Baoqiang Xia, Zhijun Qiao
nlin.SI