Two-body bound and edge states in the extended SSH Bose-Hubbard modelM. Di Liberto, A. Recati, I. Carusotto and C. MenottiEur. Phys. J. Special Topics, 226 12 (2017) 2751-2762DOI: https://doi.org/10.1140/epjst/e2016-60388-y