Discrete-time Markov chain approach to contact-based disease spreading in complex networks S. Gómez, A. Arenas, J. Borge-Holthoefer, S. Meloni and Y. Moreno EPL, 89 3 (2010) 38009 Published online: 19 February 2010 DOI: 10.1209/0295-5075/89/38009