https://www.eca.europa.eu/Lists/ECADocuments/SR23_03/SR_Energy_Union_EN.pdf
https://www.piie.com/sites/default/files/documents/wp22-12.pdf
https://cerre.eu/wp-content/uploads/2022/12/DMA_Institutions_and_Procedures.pdf
https://cerre.eu/wp-content/uploads/2023/06/CERRE_Future-of-Rail-Report_06.06.2023.pdf