Semiclassical description of anisotropic magnets for spin S=1
  In this paper, nonlinear equations describing one-dimensional non-Heisenberg ferromagnetic model are studied by use of generalized coherent states in a real parameterization. Also dissipative spin wave equation for dipole and quadruple branches is obtained if there is a small linear excitation from the ground state. 
Khikmat Kh. Muminov and Yousef Yousefi
cond-mat.str-el cond-mat.other