"Estadística de Transporte de Viajeros" [Passenger Transport Statistics]. Ine.es (in Spanish). Instituto Nacional de Estadística [National Statistics Institute]. Archived from the original on 26 September 2015. Retrieved 30 November 2015.
"Estadística de Transporte de Viajeros" [Passenger Transport Statistics]. Ine.es (in Spanish). Instituto Nacional de Estadística [National Statistics Institute]. Archived from the original on 26 September 2015. Retrieved 30 November 2015.