https://www.esri.ie/system/files/publications/SUSTAT95_0.pdf
https://www.touteleurope.eu/actualite/les-inegalites-salariales-entre-les-femmes-et-les-hommes-en-europe.html
http://www.niesr.ac.uk/sites/default/files/publications/Facing%20the%20Future%20Tackling%20post-Brexit%20Labour%20and%20skills%20NIESR.CIPD_.pdf
https://www.researchgate.net/publication/351524462_HesaMag_23_-_with_a_special_report_about_workers_in_the_food_chain/link/609bfc9b458515a04c638ff6/download