https://www.esri.ie/system/files/publications/RS123.pdf
https://eur-lex.europa.eu/eli/dir/2019/1152/oj
http://www.ftseglobalmarkets.com/news/uk-pension-deficits-rise-to-£145bn-liabilities-at-record-high.html
http://www.acea.be/uploads/publications/ACEA_position_paper-Brexit.pdf