Quantum diffusion and localization of wavepackets in disordered media F. M. Izrailev, T. Kottos, A. Politi, S. Ruffo and G. P. Tsironis Europhys. Lett., 34 6 (1996) 441-446 Published online: 01 September 2002 DOI: 10.1209/epl/i1996-00476-x