Picciotto, Robert. “Beyond GDP: Tracking and Evaluating National Contributions to Social and Environmental Sustainability”. Journal of MultiDisciplinary Evaluation 17, no. 41 (August 25, 2021): 61–78. Accessed May 2, 2026. https://jmde.journals.publicknowledgeproject.org/index.php/jmde_1/article/view/717.