S. Maslov, и S. Redner. (2009)cite arxiv:0901.2640 Comment: 3 pages, 1 figure, invited comment for the Journal of Neuroscience. The arxiv version is microscopically different from the published version.
D. Arthur, и S. Vassilvitskii. SODA '07: Proceedings of the eighteenth annual ACM-SIAM symposium on Discrete algorithms, стр. 1027--1035. Philadelphia, PA, USA, Society for Industrial and Applied Mathematics, (2007)