1. Aláez, R., Bilbao, J., Camino, V., Lasso, C., Longas, J.C., Urrutia, A., (1996). Un análisis de la demanda de transporte universitario en la Comunidad Autónoma del Paı́s Vasco, Departamento de Transporte y Obras Publicas del, Gobierno Vasco, Vitoria–Gasteiz
2. Unlimited Access;Brown;Transportation,2001
3. The demand for intercity public transport: the case of business passengers;Carlsson;Applied Economics,2003
4. What type of vehicle do people drive? The role of attitude and lifestyle in influencing vehicle type choice;Choo;Transportation Research Part A: Policy and Practice,2004
5. Consorcio de Transportes de Bizkaia (1998). Estudio de la Movilidad en Bizkaia, 1998. Bilbao