1. Data source #zIr3UkGl Type Media report Url english.vov.vn File englishvovvnhomevietnam-launch....pdf Date 2006-11-01
2. Data source #tDQAywe_ Type Media report Url ki-media.blogspot.de File ki-mediablogspotde200804planti....pdf Date 2008-04-13
3. Data source #tLUDrT_t Type Research Paper / Policy Report Url www.cde.unibe.ch File cdeunibechv1cdepdfmsc20thesis2....pdf Date 2013-01-01
4. Data source #hAgo9cb8 Type Research Paper / Policy Report Url www.globalwitness.org File globalwitnessorgsitesdefaultfi....pdf Date 2013-05-01