
https://www.ost-ausschuss.de/sites/default/files/pm_pdf/2023%2012%2006%20_%20Position%20concerning%20blockade%20on%20EU-UA%20border_final.pdf

https://static.europeanchamber.com.cn/upload/documents/documents/Nanjing_Position_Paper_2019_2020[760].pdf

https://openknowledge.worldbank.org/bitstream/handle/10986/34055/9781464815393.pdf?sequence=2&isAllowed=y