1. Recommendation CM/Rec(2012)12 of the Committee of Ministers to Member States Concerning Foreign Prisoners. Strasbourg;Committee of Ministers,2012
2. United Nations Office on Drugs and Crime (UNODC);UNODC,2017
3. Crime and criminal justice statistics challenges;del Frate,2010
4. World Prison Population List;Walmsley,2016
5. SPACE I - Council of Europe Annual Penal Statistics: Prison Populations;Aebi,2015