1. Department of MathematicsUniversity of Arizona Tucson AZ USA
2. Landau Institute for Theoretical PhysicsRAS Moscow Russia
3. Laboratory of Nonlinear Wave ProcessesNSU Novosibirsk Russia
4. Shirshov Institute of OceanologyRAS Moscow Russia
5. P.N. Lebedev Physical InstituteRAS Moscow Russia
6. Waves and Solitons LLC Phoenix AZ USA