Energy exchange and transition to localization in the asymmetric Fermi-Pasta-Ulam oscillatory chain Valeri V. Smirnov, Denis S. Shepelev and Leonid I. Manevitch Eur. Phys. J. B, 86 1 (2013) 10 Published online: 14 January 2013 DOI: 10.1140/epjb/e2012-30753-2