Ra. Kraenkel et A. Zenchuk, Camassa-Holm equation: transformation to deformed sinh-Gordon equations, cuspon and soliton solutions, J PHYS A, 32(25), 1999, pp. 4733-4747
In this paper a relation between the Camassa-Holm equation and the non-loca
l deformations of the sinh-Gordon equation is used to study some properties
of the former equation. We will show that cuspon and soliton solutions can
be obtained from soliton solutions of the deformed sinh-Gordon equation.