Sabino, Ana, Ana Moreira, Francisco Cesário, and Mafalda Pinto Coelho. “Measuring Sustainability: A Validation Study of a Triple Bottom Line (TBL) Scale in Portugal”. Emerging Science Journal 8, no. 3 (June 1, 2024): 899–916. Accessed June 19, 2025. https://www.ijournalse.org/index.php/ESJ/article/view/2352.