On a model for quantum friction. I. Fermi's golden rule and dynamics at zero temperature V. Jakšić; C. A. Pillet — 1995 Annales de l'I.H.P. Physique théorique
Scattering phases and density of states for exterior domains J.-P. Eckmann; C.-A. Pillet — 1995 Annales de l'I.H.P. Physique théorique