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http://www.wto.org/english/res_e/booksp_e/
http://www.wto.org/english/docs_e/legal_e/25-safeg.pdf
http://www.insidetrade.com
http://www.usitc.gov/publications/safeguards/
http://www.usitc.gov/
http://www.usitc.gov/publications/safeguards/pub4085.pdf
http://www.wto.org/english/news_e/news09_e/dsb_21dec09_e.htm
http://www.wto.org/english/news_e/news10_e/
http://www.ustr.gov/
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http://www.wto.org/