https://happiness-report.s3.amazonaws.com/2021/WHR+21.pdf
http://ec.europa.eu/newsroom/just/item-detail.cfm?item_id=607452
https://ec.europa.eu/info/sites/info/files/opinion-comite-adhoc-2016-10-26_en.pdf
https://www.ituc-csi.org/IMG/pdf/2023_ituc_global_rights_index_en.pdf