Morelos, José, and Juan Carlos Vergara. “Behavior of the Informal Tourism in the City of Cartagena-Colombia: Analysis of Trends in the Sector of Greater Economic Contribution”. Omnia 27, no. 2 (March 27, 2024): 51-84. Accessed October 31, 2025. https://produccioncientifica.luz.edu.ve/index.php/omnia/article/view/41796.