Long range scattering for the Wave-Schr"odinger system with large wave   data and small Schr"odinger data
  We study the theory of scattering for the Wave-Schr"odinger system with Yukawa type coupling in space dimension 3. We prove in particular the existence of modified wave operators for that system with no size restriction on the wave data in the framework of a direct method which requires smallnes of the Schr"odinger data, and we determine the asymptotic behaviour in time of solutions in the range of the wave operators. 
J. Ginibre, G.Velo