1. Solitons and Inverse Scattering Transform;Ablowitz,1981
2. The Painleve property for partial differential equations;Weiss;J. Math. Phys.,1983
3. Backlund Transformation;Miura,1973
4. The Direct Method in Soliton Theory;Hirota,2004
5. Symmetries and Differential Equations;Bluman,1989