1. Solitons, Nonlinear Evolution Equations and Inverse Scattering;Ablowitz,1991
2. Solitons and the Inverse Scattering Transform;Ablowitz,1981
3. On billiard solutions of nonlinear PDEs;Alber;Physics Letters A,1999
4. The complex geometry of weak piecewise smooth solutions of integrable nonlinear PDE’s of shallow water and Dym type;Alber;Communications in Mathematical Physics,2001
5. The geometry of peaked solitons and billiard solutions of a class of integrable PDEs;Alber;Letters in Mathematical Physics,1994