https://ecipe.org/wp-content/uploads/2022/05/ECI_22_PolicyBrief_GVC2_06_2022_LY04.pdf
http://www.cesifo-group.de/ifoHome/publications/working-papers/CESifoWP/CESifoWPdetails?wp_num=6430&CESifoWP.search=+
https://www.globaltimes.cn/page/202309/1298901.shtml
https://www.waz.de/politik/gabriel-brexit-vertrag-als-modell-fuer-eu-tuerkei-beziehung-id212938393.html