Interaction of solitons and the formation of bound states in the generalized Lugiato-Lefever equation Pedro Parra-Rivas, Damia Gomila, Pere Colet and Lendert Gelens Eur. Phys. J. D, 71 7 (2017) 198 Published online: 25 July 2017 DOI: 10.1140/epjd/e2017-80127-5