1. Solitons and the inverse scattering transform;Ablowitz,1981
2. Solitons and spectral transform I;Calogero,1982
3. Theory of solitons: the inverse scattering method;Novikov,1984
4. Darboux transformations and solitons;Matveev,1991
5. Darboux transformations in integrable systems;Gu,2005