
https://www.frontier-economics.com/media/5550/a-wholesale-gas-price-cap-in-europe.pdf

https://www.pymnts.com/news/b2b-payments/2020/deloitte-becomes-first-of-big-four-to-break-up-business/

https://ec.europa.eu/growth/tools-databases/dem/monitor/sites/default/files/DTM_Industrie%204.0.pdf