Claveria, Oscar and Datzira, Jordi (2008): Tourism Demand in Catalonia: Detecting External Economic Factors. Published in: TOURISMOS: An International Multidisciplinary Journal of Tourism , Vol. 4, No. 1 (15. October 2009): pp. 13-28.
Herranz-Loncan, Alfonso (2011): The contribution of railways to economic growth in Latin America before 1914: a growth accounting approach. Unpublished.
