https://www.esri.ie/sites/default/files/media/file-uploads/2020-01/Slides_1.pdf
http://The European Social Pillar – Towards An EU Minimum Wage Policy?
https://www.occrp.org/en/daily/17580-dr-congo-exposes-tens-of-thousands-of-ghost-workers-across-government-ministries
http://ec.europa.eu/epsc/sites/epsc/files/epsc_europe_is_back_trends_jan.pdf