Dynamical two electron states in a Hubbard-Davydov modelL. Cruzeiro, J. C. Eilbeck, J. L. Marín and F. M. RussellEur. Phys. J. B, 42 1 (2004) 95-102DOI: https://doi.org/10.1140/epjb/e2004-00360-1