Gutiérrez Pérez, José, and María Teresa Pozo Llorente. “Using Qualitative Indicators of Sustainability in Iberoamerican Environmental Research”. Forum Qualitative Sozialforschung / Forum: Qualitative Social Research 7, no. 4 (September 30, 2006). Accessed November 21, 2024. https://www.qualitative-research.net/index.php/fqs/article/view/172.