L. CARVALHO, Fátima; C. FERNANDES, Sílvia. COVID-19 Impact on Tourism: The System Thinking Approach Applied to the Case of Portugal. Journal of Tourism, Sustainability and Well-being, [S. l.], v. 10, n. 2, p. 75–87, 2022. DOI: 10.34623/1qx6-f493. Disponível em: https://journals.cinturs.pt/jtsw/article/view/307. Acesso em: 27 oct. 2025.