Darboux Transformation and Exact Solutions of the integrable Heisenberg   ferromagnetic equation with self-consistent potentials
  Integrable Heisenberg ferromagnetic equations are an important subclass of integrable systems. The M-XCIX equation is one of a generalizations of the Heisenberg ferromagnetic equation and are integrable. In this paper, the Darboux transformation of the M-XCIX equation is constructed. Using the DT, a 1-soliton solution of the M-XCIX equation is presented. 
Z.S. Yersultanova, M. Zhassybayeva, K. Yesmakhanova, G. Nugmanova and   R. Myrzakulov
nlin.SI