References
- Rahimifard, S., and H. Trollman. 2017. “Surpassing Sustainability: Making a ‘Net-positive’ Impact.” International Journal of Sustainable Engineering 10 (6): 299–301.
- Sustainable Development Goal Indicators (E/CN.3/2016/2/Rev.1), Annex IV. 2016. Accessed January 4, 2017. https://sustainabledevelopment.un.org/content/documents/11803Official-List-of-Proposed-SDG-Indicators.pdf