Soliton-like behavior in fast two-pulse collisions in weakly perturbed linear physical systems Avner Peleg, Quan M. Nguyen and Toan T. Huynh Eur. Phys. J. D, 71 12 (2017) 315 Published online: 07 December 2017 DOI: 10.1140/epjd/e2017-80358-4