https://www.econstor.eu/bitstream/10419/300311/1/1895160103.pdf
https://single-market-economy.ec.europa.eu/system/files/2023-03/Study%202023%20CRM%20Assessment.pdf
https://cdn.occrp.org/projects/narcofiles-the-new-criminal-order/es/
https://www.eca.europa.eu/Lists/ECADocuments/SR23_03/SR_Energy_Union_EN.pdf