1. Solitons; Nonlinear Evolution Equations and Inverse Scattering;Ablowitz,1991
2. Darboux Transformation and Solitons;Matveev,1991
3. Bäcklund and Darboux Transformations Geometry and Modern Applications in Soliton Theory;Rogers,2002
4. Symmetries and Differential Equations;Bluman,1989
5. Direct Methods in Soliton Theory;Hirota,2004