J. B. Neaton K. H. Khoo C. D. Spataru Steven G. Louie Electron transport and optical properties of carbon nanostructures from first principles. 1-8 2005 169 Computer Physics Communications 1-3 http://dx.doi.org/10.1016/j.cpc.2005.03.003 db/journals/cphysics/cphysics169.html#NeatonKSL05