Electronic structures for armchair-edge graphene nanoribbons under a small uniaxial strain W. H. Liao, B. H. Zhou, H. Y. Wang and G. H. Zhou Eur. Phys. J. B, 76 3 (2010) 463-467 Published online: 16 July 2010 DOI: 10.1140/epjb/e2010-00222-3