Characterization of complex networks by higher order neighborhood properties R. F.S. Andrade, J. G.V. Miranda, S. T.R. Pinho and T. P. Lobão Eur. Phys. J. B, 61 2 (2008) 247-256 Published online: 06 February 2008 DOI: 10.1140/epjb/e2008-00049-5