1. Caida, Skitter project, url: http://www.caida.org/tools/measurement/skitter.
2. The oscillatory distribution of distances in random tries;Christophi;Ann Appl Probab,2005
3. L. Dall'Astra, I. Alvarez-Hameli, A. Barrat, A. Vásquez, and A. Vespignani, A statistical approach to the traceroute exploration of networks: Theory and simulations, Available at arXiv:cond-mat/0406404, June 2004.