https://www.sfo.gov.uk/2018/03/22/sfo-recovers-4-4m-from-corrupt-diplomats-in-chad-oil-share-deal/
http://www.css.ethz.ch/content/dam/ethz/special-interest/gess/cis/center-for-securities-studies/pdfs/Cyber-Reports-2017-07.pdf
https://www.agence-francaise-anticorruption.gouv.fr/files/files/Factsheet_global_mapping_ACAs.pdf
https://www.bertelsmann-stiftung.de/fileadmin/files/BSt/Publikationen/GrauePublikationen/WKIO_2020_final.pdf?utm_source=POLITICO.EU&utm_campaign=15a7cc1e87-EMAIL_CAMPAIGN_2020_04_08_08_59&utm_medium=email&utm_term=0_10959edeb5-15a7cc1e87-190380769