Yousefifar, S., and A. Riahi. “A Historical Study of Immigration Phenomenon in Undeveloped Societies: Study of Economic Reasons of Immigration During Pahlavi I Period in Zahedan”. Journal of History Culture and Art Research, vol. 6, no. 2, Apr. 2017, pp. 169-86, doi:10.7596/taksad.v6i2.654.