Abdel-Moneim, N. M., H. A. E. Khalil, and R. R. Kamel, "Developing QOL Index for Resettlement Projects of Unsafe Areas in Egypt", Urban Forum, 2021.
Nicolopoulou, K., A. M. Salama, S. Attia, C. Samy, D. Horgan, H. A. E. E. Khalil, and A. Bakhaty, "Re-enterprising the unplanned urban areas of Greater Cairo- a social innovation perspective", Open House Internationa, vol. Ahead-of-print, issue Ahead-of-print, 2021.
Khalil, H., "Enhancing Livability through Resource Efficiency: An Urban Metabolism Study in Cairo", The Materials Book, Berlin, Ruby Press, 2020.
Khalil, H. A. E. E., and A. Al-Ahwal, "Reunderstanding Cairo through urban metabolism: Formal versus informal districts resource flow performance in fast urbanizing cities", Journal of Industrial Ecology, vol. 25, pp. 176–192, 2021.
Khalil, H., and P. Shahmohamadi, "Materials and Facades", Climate Check for Compact Neighbourhoods: Cairo Imbaba: International Academy Berlin & Cairo University, 2017.
Khalil, H., "Community Involvement", Climate Check for Compact Neighbourhoods: Cairo Imbaba: International Academy Berlin & Cairo University, 2017.
Khalil, H., and N. Abdel-Moneim, Gender Equity in Cities of the MENA Region: Women’s Right to the City, : ACADEMY Publishing Center, 2020.
Khalil, H. A. E. E., and S. Gammaz, "Supporting Informal Areas Resilience: Reinforcing Hidden Green Potentials for a Better Quality of Life", Ecocities Now: Building the Bridge to Socially Just and Ecologically Sustainable Cities: Springer, Cham, 2020.
Khalil, H. A. E. E., "Formalizing Informal Urbanism: Markets and Development. The story of Cairo", ACC Urban Conference, Cape Town, 1-3 February, 2018.
Khalil, H. A. E. E., "New Urbanism, Smart Growth and Informal Areas: Aquest for Sustainability", CSAAR Conference 2010, Sustainable Architecture & Urban Development, Amman, Jordon, 2010. Abstractnew_urbanism_smart_growth_and_informal_areas__a_quest_for_sustainability_with_conf_title.pdf

Informal urban growth has been the primary trend of urban growth for the past decades, mostly in developing countries where there is a clear lack of proper urban planning and management. Thus the study of these areas and their impact is most needed. On the other hand, in the developed world, there has been a debate about sustainable development and whether to go compact or to disperse and integrate with nature. There are a number of middle positions; the urban village, ‘new urbanism’, the sustainable urban matrix, transit-oriented development, smart growth and sustainable urbanism, which try to combine the energy efficiency gained from a compact urban form with the broader quality-of-life aspects gained from the dispersed city. This paper attempts to compare the main guidelines of sustainable urbanism theories to informal urban development, addressing issues of sustainability. The study will depend mainly on informal areas built on agricultural land, which is almost exclusive to Egypt rather than squatter areas. By highlighting their sustainability advantages and the disadvantages, potentials can be preserved when attempting to upgrade or rebuild these areas and assure their sustainability based on local proven experience. Thus, participating in the quest for more sustainable cities locally rooted rather than globally induced.