https://eur-lex.europa.eu/legal-content/EN/TXT/PDF/?uri=CELEX:52022PC0457&from=EN
https://ec.europa.eu/commission/presscorner/detail/en/ip_20_1968
https://cerre.eu/wp-content/uploads/2023/06/CERRE_Future-of-Rail-Report_06.06.2023.pdf
https://www.ipg-journal.de/regionen/global/artikel/detail/die-pandemie-profiteure-4454/