1. United Nations Human Settlements Programme (UN-HABITAT) State of the World's Cities 2006/07: The Millennium Development Goals and Urban Sustainability: 30 Years of Shaping the Habitat Agenda http://www.unhabitat.org/pmss/listItemDetails.aspx?publicationID=2101
2. United Nations Office on Drugs and Crime (UNODC) & Latin America and the Caribbean Region of the World Bank Crime, Violence, and Development: Trends, Costs, and Policy Options in the Caribbean http://www.unodc.org/pdf/research/Cr_and_Vio_Car_E.pdf
3. Official crime statistics and survey data: Comparing trends of youth violence between 2000 and 2006 in cities of the Czech Republic, Germany, Poland, Russia, and Slovenia;Enzmann;European Journal on Criminal Policy and Research,2010
4. Study on the diversification trend and countermeasures of juvenile crime;Yang;Journal of Politics and Law,2010
5. Ministry of Justice, Taiwan General situation and analysis of juvenile delinquency (in Chinese) http://www.moj.gov.tw/public/Attachment/281317152220.pdf