Inverse scattering for the one-dimensional Stark effect and application to the cylindrical KdV equation S. Graffi; E. Harrell — 1982 Annales de l'I.H.P. Physique théorique
Resonances and convergence of perturbation theory for N-body atomic systems in external AC-electric field S. Graffi; V. Grecchi; H. J. Silverstone — 1985 Annales de l'I.H.P. Physique théorique