Amer, Mohamed Saleh, Mohammad Rafee Majid, and Tahar A. Ledraa. 2021. “The Riyadh Urban Growth Boundary: An Analysis of the Factors Affecting Its Efficiency on Restraining Sprawl”. International Journal of Built Environment and Sustainability 8 (3):17-25. https://doi.org/10.11113/ijbes.v8.n3.704.