https://wiiw.ac.at/alternatives-in-the-design-of-sovereign-green-bonds-dlp-6412.pdf
https://www.boeckler.de/pdf/p_imk_report_125e_2017.pdf
https://pure.royalholloway.ac.uk/portal/files/26649214/arkolakis_doxiadis_galenianos_greek_trade_adjustment_september_2014.pdf
https://www.greatbritishpolitics.co.uk/europe/654-dual-nationality-and-the-hurdles-facing-britons-who-want-to-keep-eu-citizenship-after-brexit.html