https://somme450.wixsite.com/scott/research
http://sro.sussex.ac.uk/id/eprint/110932/1/BP-70.pdf
https://wiiw.ac.at/austria-s-economic-relations-with-the-eu-eastern-partnership-countries-and-russia-dlp-6925.pdf
https://www.waz.de/politik/gabriel-brexit-vertrag-als-modell-fuer-eu-tuerkei-beziehung-id212938393.html