%0 Journal Article %A Taher Tolou Del, Mohammad Sadegh, Zare, Marzieh, Sadat, Seyedeh Ashraf %T Study the Social Instability in Informal Settlements Based on the Challenges of Sustainable Urban Development (Case Study: 2nd District in Tehran Farahzad Neighborhood) %J Journal of Geography and Environmental Studies %V 10 %N 38 %P 83-101 %D 2021 %R %U https://sanad.iau.ir/fa/Article/978927