%0 Journal Article %A Giovanni Ortenzi %T Some Remarks on the KP System of the Camassa–Holm Hierarchy %J Symmetry, integrability and geometry: methods and applications %D 2007 %V 3 %U http://geodesic.mathdoc.fr/item/SIGMA_2007_3_a46/ %G en %F SIGMA_2007_3_a46