Taher Tolou Del, Mohammad Sadegh, Zare, Marzieh, Sadat, Seyedeh Ashraf. “Study the Social Instability in Informal Settlements Based on the Challenges of Sustainable Urban Development (Case Study: 2nd District in Tehran Farahzad Neighborhood).” Journal of Geography and Environmental  Studies, vol. 10, no. 38, 2021, pp. 83-101.