1. Brueggeman, W.B., A.H. Chen, and T.G. Thibodeau. “Real Estate Investment Funds: Performance and Portfolio Consideration”. AREUEA Journal (Fall 1984), 333–354.
2. Elton, E. and M.J. Gruber. Modern Portfolio Theory and Investment Analysis, 3rd ed. New York: John Wiley & Sons, 1987.
3. Elton, E.J., M.J. Gruber, and M.W. Padberg. “Simple Criteria for Optimal Portfolio Selection”. Journal of Finance 31 (December 1976).
4. Friedman, H.C. “Real Estate Investment and Portfolio Theory”. Journal of Financial and Quantitative Analysis (March 1971), 861–874.
5. Gau, G. and K. Wang. “A Further Examination of Appraisal Data and the Potential Bias in Real Estate Return Indexes”. AREUEA Journal (Spring 1990), 40–48.