Ribeiro, Elvira da Costa, and Bing Wang. “Tourism Led Growth Hypothesis: Has the Tourism Industry an Impact on The Economic Growth of Sao Tome and Principe?”. International Journal of Economics and Financial Issues 10, no. 1 (December 26, 2019): 180–185. Accessed April 20, 2024. https://www.econjournals.com/index.php/ijefi/article/view/9105.