http://www.rand.org/content/dam/rand/pubs/research_reports/RR1700/RR1786z1/RAND_RR1786z1.pdf
https://www.europarl.europa.eu/doceo/document/PEGA-PR-738492_EN.pdf
https://www.ips-journal.eu/topics/foreign-and-security-policy/a-bitter-battlefield-stalemate-6924/
https://www.ilblogdellestelle.it/2020/02/la-mafia-va-contrastata-a-livello-europeo.html