DUARTE, António Portugal - GARCIA, Inês Veloso - MURTA, Fátima Sol. Business Cycles and Tourism Activity: The Case of Portugal. - Registrovaný: Scopus. In International Journal of Services, Economics and Management. - Geneve : Inderscience Enterprises Limited. ISSN 1753-0822, 2024, vol. 15, no. 3, pp. 273-289.