RIETVELD, P.; DEKKERS, J.; VAN WOUDENBERG, S. Choice of Frequency and Vehicle Size in Rail Transport: Implications for Marginal External Costs. European Journal of Transport and Infrastructure Research, [S. l.], v. 2, n. 2/3, 2002. DOI: 10.18757/ejtir.2002.2.2.3691. Disponível em: https://journals.open.tudelft.nl/ejtir/article/view/3691. Acesso em: 5 oct. 2022.