Superdiffusion and encounter rates in diluted, low dimensional worlds F. Bartumeus, P. Fernández, M. G.E. da Luz, J. Catalan, R. V. Solé and S. A. Levin Eur. Phys. J. Special Topics, 157 (2008) 157-166 Published online: 23 April 2008 DOI: 10.1140/epjst/e2008-00638-6