China Frees 21 Detained over Pollution Protests
Reuters, July 4, 2012
http://www.reuters.com/article/2012/07/04/us-china-pollution-protest-idUSBRE86205C20120704
申请“七一游行”被拒 反被拘留扣查 (Guangdong: Chen Fengqiang Detained for Applying to Demonstrate)
Radio Free Asia, July 3, 2012
http://www.rfa.org/mandarin/yataibaodao/ql2-07032012103644.html
中国官媒批评什邡当局处理手法 (Official Media Criticizes Handling of Shifeng Protests)
British Broadcasting Corporation, July 4, 2012
http://www.bbc.co.uk/zhongwen/simp/chinese_news/2012/07/120704_china_shifang.shtml
