Ghorashi, F. ., and R. . Darabi. “Compare Value at Risk and Return of Assets Portfolio Stock, Gold, REIT, U.S. & Iran Market Indices”. Asian Journal of Economic Modelling, vol. 5, no. 1, Nov. 2016, pp. 44-48, doi:10.18488/journal.8/2017.5.1/8.1.44.48.