
http://www.acea.be/uploads/publications/ACEA_position_paper-Brexit.pdf

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

https://www.eurofound.europa.eu/sites/default/files/ef_publication/field_ef_document/ef1714en.pdf