C 1s core photoemission of C60 and C48N12 R.-J. Tarento, P. Joyes, S. Benlamari, R. Lahreche and D. E. Mekki Eur. Phys. J. D, 43 1-3 (2007) 237-240 Published online: 24 May 2007 DOI: 10.1140/epjd/e2007-00110-1