Signatures of polaron formation in systems with local and non-local electron-phonon couplings E. Piegari, C. A. Perroni and V. Cataudella Eur. Phys. J. B, 44 4 (2005) 415-421 Published online: 30 May 2005 DOI: 10.1140/epjb/e2005-00140-5