Taher Tolou Del, Mohammad Sadegh, Zare, Marzieh, Sadat, Seyedeh Ashraf (2021) ‘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, 10(38), pp. 83-101. doi: