
https://www.ceps.eu/system/files/CEPS%20-%20LINKEDIN%20study%20FINAL.pdf

http://www.inegalites.fr/spip.php?page=analyse&id_article=2289&id_rubrique=64&id_mot=30&id_groupe=9

https://www.occrp.org/en/daily/17580-dr-congo-exposes-tens-of-thousands-of-ghost-workers-across-government-ministries