https://www.socialeurope.eu/the-ranks-of-the-working-poor
https://www.socialeurope.eu/2017/07/real-measure-inequality/
http://www.acea.be/uploads/publications/ACEA_position_paper-Brexit.pdf
https://www.ons.gov.uk/employmentandlabourmarket/peopleinwork/earningsandworkinghours/articles/contractsthatdonotguaranteeaminimumnumberofhours/may2017