A.  Batra, Cvetko, D., Kladnik, G., Adak, O., Cardoso, C., Ferretti, A., Prezzi, D., Molinari, E., Morgante, A., and Venkataraman, L., ?Probing the mechanism for graphene nanoribbon formation on gold surfaces through Xray spectroscopy?, Chemical science (Camb. 2010. Print), vol. 5, pp. 4419?4423, 2014.