Energy exchange and transition to localization in the asymmetric Fermi-Pasta-Ulam oscillatory chainValeri V. Smirnov, Denis S. Shepelev and Leonid I. ManevitchEur. Phys. J. B, 86 1 (2013) 10DOI: https://doi.org/10.1140/epjb/e2012-30753-2