Three-Phase Freak Waves
  In the article, we describe three-phase finite-gap solutions of the focusing nonlinear Schr\"odinger equation and Kadomtsev-Petviashvili and Hirota equations that exhibit the behavior of almost-periodic "freak waves". We also study the dependency of the solution parameters on the spectral curves. 
Aleksandr O. Smirnov, Sergei G. Matveenko, Sergei K. Semenov and Elena   G. Semenova
math-ph math.MP nlin.PS nlin.SI