Lattice representation and dark solitons of the Fokas-Lenells equation
  This work is devoted to an integrable generalization of the nonlinear Schr\"odinger equation proposed by Fokas and Lenells. I discuss the relationships between this equation and other integrable models. Using the reduction of the Fokas-Lenells equation to the already known ones I obtain the N-dark soliton solutions. 
V.E. Vekslerchik
nlin.SI