Manrai, L. A. ., A. . K, and S. . Friedeborn. “Environmental Determinants of Destination Competitiveness and Its Tourism Attractions-BasicsContext, A-B-C, Indicators A Review, Conceptual Model and Propositions”. Journal of Economics, Finance and Administrative Science, vol. 25, no. 50, Dec. 2020, pp. 425-49, https://revistas.esan.edu.pe/index.php/jefas/article/view/52.