https://wiiw.ac.at/can-multinationals-withstand-growing-trade-barriers-dlp-6732.pdf
https://www.europarl.europa.eu/meetdocs/2009_2014/documents/deea/dv/2203_07/2203_07en.pdf
https://trade.ec.europa.eu/doclib/docs/2022/february/tradoc_160043.pdf
http://trade.ec.europa.eu/doclib/docs/2017/june/tradoc_155642.pdf