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The local bridges in the plot are in fact bridges as well. See Granovetter (1973): The Strength of Weak Ties...
i agree~~ — Preceding unsigned comment added by 129.132.198.93 (talk) 15:27, 31 May 2011 (UTC)[reply]
All three of the references are now broken links. — Preceding unsigned comment added by 198.151.217.177 (talk) 19:29, 15 May 2013 (UTC)[reply]