Erratum to: Termini effects on the optical properties of graphene nanoribbons - Eur. Phys. J. B (2018) 91: 286, https://doi.org/10.1140/epjb/e2018-90179-4Claudia Cardoso, Andrea Ferretti and Deborah PrezziEur. Phys. J. B, 91 12 (2018) 320DOI: https://doi.org/10.1140/epjb/e2018-90692-4