http://eur-lex.europa.eu/legal-content/EN/TXT/PDF/?uri=CELEX:52016DC0950&from=en
https://www.al-monitor.com/originals/2023/11/how-russias-redut-pmc-forced-rival-wagner-withdraw-syria
https://www.ilblogdellestelle.it/2020/02/la-mafia-va-contrastata-a-livello-europeo.html