
https://blogs.lse.ac.uk/europpblog/2023/03/13/what-impact-have-eu-sanctions-had-on-the-russian-economy/

https://www.cer.eu/sites/default/files/insight_SL_5.11.19_2.pdf

https://wiiw.ac.at/regulatory-convergence-within-technical-barriers-to-trade-dlp-6630.pdf