Elastic and inelastic collisions of interfacial solitons and integrability of a two-layer fluid system subject to horizontal vibrationsDenis S. Goldobin, Kseniya V. Kovalevskaya and Dmitry V. LyubimovEPL, 108 5 (2014) 54001DOI: https://doi.org/10.1209/0295-5075/108/54001