Developing a Sustainable Competitiveness Model in The Spa Tourism Sector: An Empirical Study of Vietnam Destinations. Journal of Aviation Science and Technology (ISSN: 2815-5661), [S. l.], v. 2, n. 1, 2026. Disponível em: https://ojs.vaajast.org/index.php/jast/article/view/79.. Acesso em: 21 apr. 2026.