1. Bettencourt, L. (2013). The Kind of Problem a City is. SFI Working Paper: 2013-03-008. Santa Fe NM: Santa Fe Institute. Accessed on the Web at https://sfi-edu.s3.amazonaws.com/sfi-edu/production/uploads/sfi-com/dev/uploads/filer/fa/f6/faf61418-fc4f-42d5-8c28-df1197a39018/13-03-008.pdf.
2. Clos, J. (2016). “We have lost the science of building cities.” Interview in The Guardian, 18 April 2016. Accessed on the Web December 4, 2017 at https://www.theguardian.com/cities/2016/apr/18/lost-science-building-cities-joan-clos-un-habitat
3. Clos, J. (2017). “Housing Policies: Affordable homes message by Dr. Joan Clos, UN-Habitat Executive Director.” Accessed at https://reliefweb.int/report/iraq/housing-policies-affordable-homes-message-dr-joan-clos-un-habitat-executive-director
4. Clos, J. (2018). Interview at the World Urban Forum, Kuala Lumpur, Malaysia. Accessed on the Web at https://www.youtube.com/watch?v=gCO7vPt96Tk&list=PLFjow8ghakAxnLj95HLkeIVkJHQHIyDXY&t=0s&index=14
5. Jacobs, J. (1961). The Death and Life of Great American Cities. New York: Random House.