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untreaty.un.org, Law of treatiesLưu trữ 17 tháng 10 2013 tại Wayback Machine, International Law Commission, last update: 30 June 2005. Consulted on 7 December 2008.
untreaty.un.org, Law of treatiesLưu trữ 17 tháng 10 2013 tại Wayback Machine, International Law Commission, last update: 30 June 2005. Consulted on 7 December 2008.