K. Suchecki, A. Salah, C. Gao, и A. Scharnhorst. (2012)cite arxiv:1203.0788Comment: Preprint of an article submitted for consideration in Advances in Complex Systems (2012) http://www.worldscinet.com/acs/, 19 pages, 7 figures.
X. Wu, L. Zhang, и Y. Yu. WWW '06: Proceedings of the 15th international conference on World Wide Web, стр. 417--426. New York, NY, USA, ACM Press, (2006)