1. Alade, T., Edelenbos, J., & Gianoli, A. (2020). A sustainable approach to innovation adoption in light-rail transport. Sustainability, 12(3), 1–23.
2. Badejo, B. (2009). Unbundling the challenges of transportation and development in Nigeria: The Lagos state example being the sixtieth anniversary lecture organised by the Department of Geography, Faculty of Social Sciences. University of Ibadan.
3. Barth, B. (2014, March 15). Curitiba: The greenest city on earth. The Ecologist. http://www.theecologist.org/green_green_living/2299325/curitiba_the_greenest_city_on_earth.html.
4. Beard, V., Mahendra, A., & Westphal, M. (2016). Towards a more equal city: Framing the challenges and opportunities. World Resources Institute Working Paper (pp. 1–46). 25857.pdf (issuelab.org).
5. C40. (2016, November). Addis Ababa light rail project. https://www.c40.org/awards/2016-awards/profiles/107