Electron transport in graphene nanoribbons under a central potential modulationY. E. Xie, Y. P. Chen, X. L. Wei, Y. Tang, J. W. Ding and J. X. ZhongEur. Phys. J. B, 78 3 (2010) 381-385DOI: https://doi.org/10.1140/epjb/e2010-10338-y