https://theconversation.com/eu-enlargement-what-does-the-future-hold-227716
http://www.congreso.es/consti/constitucion/indice/titulos/articulos.jsp?ini=155&tipo=2
https://www.feps-europe.eu/attachments/publications/our_european_future_ipdf%201.pdf
https://www.socialeurope.eu/eu-competition-policy-needs-a-fundamental-rethink