NIJKAMP, P. In memoriam Piet Rietveld. European Journal of Transport and Infrastructure Research, [S. l.], v. 14, n. 1, 2014. DOI: 10.18757/ejtir.2014.14.1.3011. Disponível em: https://journals.open.tudelft.nl/ejtir/article/view/3011. Acesso em: 28 jan. 2022.