http://www.vietnamgateway.org/about/vn_index.php? id=0104&cid=060327134042 http://nguoihatinh.net/diendan/showthread.php?t=9349 http://www.dangcongsan.vn/cpv/Modules/News/NewsDetail.aspx? co_id=30296&cn_id=337789#DKP1S3Ip1tif