https://insightcrime.org/news/quality-cocaine-worse-united-states-europe/
https://www.brookings.edu/opinions/the-foreign-policies-of-the-sinaloa-cartel-and-cjng-part-iii-africa/
https://advances.sciencemag.org/content/advances/6/14/eaay3539.full.pdf
http://www.bertelsmann-stiftung.de/fileadmin/files/BSt/Publikationen/GrauePublikationen/NW_EU_Social_Justice_Index_2017.pdf