http://www.ftseglobalmarkets.com/news/uk-pension-deficits-rise-to-£145bn-liabilities-at-record-high.html
https://www.eurofound.europa.eu/sites/default/files/ef_publication/field_ef_document/ef1663en.pdf
http://institutdelors.eu/wp-content/uploads/2018/03/Quelleambitionpourlautorit%C3%A9europ%C3%A9ennedutravail-Fernandes-mars18.pdf