WALKER, Warren E.; BAARSE, Gerrit; VELZEN, Andre van; JÄRVI, Tuuli. Assessing the Variation in Rail Interoperability in 11 European Countries, and Barriers to its Improvement. European Journal of Transport and Infrastructure Research, [S. l.], v. 9, n. 1, 2009. DOI: 10.18757/ejtir.2009.9.1.3283. Disponível em: https://journals.open.tudelft.nl/ejtir/article/view/3283. Acesso em: 5 may. 2024.