https://www.europarl.europa.eu/RegData/etudes/BRIE/2023/754632/EPRS_BRI(2023)754632_EN.pdf
https://www.brookings.edu/articles/payment-systems-changing-role-from-economic-growth-to-the-new-foreign-policy-lever/
https://wwfeu.awsassets.panda.org/downloads/ets_revenues_report_2022___web___final.pdf
https://www.etui.org/sites/default/files/2022-08/Mapping%20eco-social%20policy%20mixes%20for%20a%20just%20transition%20in%20Europe_2022.pdf