1. Nonlinear Evolution Equations: Integrability and Spectral Method,1990
2. Nonlinear Evolution Equations and Dynamical Systems,1990
3. A generalization of the inverse scattering method;Wadati;J. Phys. Soc. Japan,1979
4. New integrable evolution equations;Wadati;J. Phys. Soc. Japan,1979
5. New integrable nonlinear equations leading to exotic solitons;Ichikawa,1983