VAN DER SPEK, S. Spatial Metro: Tracking pedestrians in historic city centres. Research in Urbanism Series, [S. l.], v. 1, p. 77–97, 2008. DOI: 10.7480/rius.1.198. Disponível em: https://www.rius.ac/index.php/rius/article/view/59. Acesso em: 7 oct. 2022.