Spolaor, Silvia, y Vítor Oliveira. «Towards a Progressive Understanding of Informal Settlements: The Contribution of the Fringe-Belt Concept». Revista Brasileira de Gestão Urbana 14 (diciembre 8, 2022). Accedido mayo 4, 2025. https://periodicos.pucpr.br/Urbe/article/view/29463.