MARTÍNEZ ESPINAL, Manuel. Public bus services versus congestion and pollution in Lima and Callao. Economia, [S. l.], v. 40, n. 79, p. 47–86, 2017. DOI: 10.18800/economia.201701.002. Disponível em: https://revistas.pucp.edu.pe/index.php/economia/article/view/19272. Acesso em: 30 dec. 2025.