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→External links
* [http://www.lifewithalacrity.com/2004/03/the_dunbar_numb.html The Dunbar Number as a Limit to Group Sizes] by Christopher Allen – applying Dunbar's number to on-line gaming, social software, collaboration, trust, security, privacy, and internet tools, by Christopher Allen
* [http://www.lifewithalacrity.com/2004/03/the_dunbar_numb.html The Dunbar Number as a Limit to Group Sizes] by Christopher Allen – applying Dunbar's number to on-line gaming, social software, collaboration, trust, security, privacy, and internet tools, by Christopher Allen
• 邓巴数：团体规模的极限 - 克里斯托弗·艾伦（Christopher Allen）
• 邓巴数：团体规模的极限 - 克里斯托弗·艾伦（Christopher Allen）
* [https://web.archive.org/web/20141202004603/http://fora.tv/2010/02/18/Robin_Dunbar_How_Many_Friends_Does_One_Person_Need Robin Dunbar: How Many Friends Does One Person Need?] Fora.TV talk at the RSA
* [https://web.archive.org/web/20141202004603/http://fora.tv/2010/02/18/Robin_Dunbar_How_Many_Friends_Does_One_Person_Need Robin Dunbar: How Many Friends Does One Person Need?] Fora.TV talk at the RSA
• 罗宾·邓巴：一个人需要几个朋友？ - Fora.TV talk at the RSA
• 罗宾·邓巴：一个人需要几个朋友？ - Fora.TV talk at the RSA