https://www.institute.global/insights/geopolitics-and-security/windsor-framework-what-has-been-agreed-and-what-it-means-northern-ireland-protocol
https://dgap.org/de/forschung/publikationen/europa-braucht-eine-bessere-geooekonomische-strategie
https://openknowledge.worldbank.org/bitstream/handle/10986/34055/9781464815393.pdf?sequence=2&isAllowed=y