Martin, Juan Carlos, Juan Carlos García-Palomares, Javier Gutierrez, and Concepción Román. “Efficiency and Equity of Orbital Motorways in Madrid”. Journal of Transport and Land Use 3, no. 1 (May 28, 2010). Accessed May 4, 2026. https://jtlu.org/index.php/jtlu/article/view/106.