http://www.ips-journal.eu/regions/europe/article/show/myth-of-the-echo-chamber-2135/
https://www.rtbf.be/info/monde/detail_la-taxe-tobin-doit-faire-partie-de-reformes-economiques-plus-larges-pour-charles-michel?id=9694965
http://library.fes.de/pdf-files/bueros/rom/16042.pdf
https://www.hesa.ac.uk/data-and-analysis/publications/finances-2015-16/introduction