全球联署呼吁中国释放刘晓波夫妇 (Nobel Laureates Urge China to Release Liu Xiaobo and Wife)
British Broadcasting Corporation, February 27, 2013
http://www.bbc.co.uk/zhongwen/simp/china/2013/02/130227_petition_liuxiaobo_taiwan.shtml
Related:
Nobel laureates urge China to release Liu Xiaobo
South China Morning Post, February 27, 2013
http://www.scmp.com/news/china/article/1159861/nobel-laureates-urge-china-release-liu-xiaobo