1. Inter-Agency and Expert Group on Sustainable Development Goal Indicators, Report of the Inter-Agency and Expert Group on Sustainable Development Goal Indicators (E/CN.3/2016/2/Rev.1), Annex IVhttps://sustainabledevelopment.un.org/content/documents/11803Official-List-of-Proposed-SDG-Indicators.pdf
2. Habitat III New Urban Agenda: Quito Declaration on Sustainable Cities and Human Settlements for All. Habitat III Conference, no. October 2016; p. 24http://www.eukn.eu/news/detail/agreed-final-draft-of-the-new-urban-agenda-is-now-available/
3. Greening Household Behaviour,2011
4. The urban sustainable development goal: Indicators, complexity and the politics of measuring cities
5. The Meddin Bike-Sharing World Map. Google Mapshttps://bikesharingworldmap.com/#/all/2.3/-1.57/33.92/