Macedo, Anthony, Sofia Gouveia, and João Rebelo. “Macroeconomic Determinants of Port and Douro Wine Exports: An Econometric Approach”. REGION 7, no. 2 (November 20, 2020): L1-L8. Accessed November 15, 2024. http://region.wu.ac.at/ojs/index.php/region/article/view/314.