1. Solitons and the Inverse Scattering Transform;Ablowitz,1981
2. Solitons and Spectral Transform I;Calogero,1982
3. Darboux Transformations and Solitons;Matveev,1991
4. The Direct Method in Soliton Theory;Hirota,2004
5. N-soliton solution and the Hirota condition of a (2+1)-dimensional combined equation;Ma;Math. Comput. Simulation,2021