https://www.boeckler.de/pdf/p_study_hbs_376.pdf
https://www.occrp.org/en/daily/8796-slovakia-s-president-calls-out-state-for-mafia-cover-up
https://insightcrime.org/news/drug-traffickers-royalties-narco-series/
https://www.veblen-institute.org/IMG/pdf/rapport_pub_et_conso_synthese.pdf