https://www.morganlewis.com/documents/m/documents/cartel/cartel-report_end-2018_190022.pdf
https://cerre.eu/wp-content/uploads/2023/07/CERRE-Draft-Issue-Paper-DMA-Output-Indicators.pdf
https://www.socialeurope.eu/2017/05/irelands-brexit-borders-possible-solution/