B. Grebert et Jc. Guillot, PERIODIC-SOLUTIONS OF COUPLED NONLINEAR SCHRODINGER-EQUATIONS IN NONLINEAR OPTICS - THE RESONANT CASE, Applied mathematics letters, 9(1), 1996, pp. 65-68
We construct periodic solutions to coupled nonlinear one-dimensional S
chrodinger equations with periodic boundary conditions in the some res
onant situations.