
http://www.cesifo-group.de/ifoHome/publications/working-papers/CESifoWP/CESifoWPdetails?wp_num=6430&CESifoWP.search=+

https://www.institutmontaigne.org/en/expressions/franco-german-couple-duo-duel-helm-european-union

https://theconversation.com/pueden-america-latina-y-el-caribe-salvar-a-europa-205815