1. Approximating expected utility by a function of mean and variance,;Levy;Am. Econom. Rev.,1979
2. Mean–Variance versus direct utility maximization,;Kroll;J. Finance,1984
3. C.-F. Huang, R.H. Litzenberger, Foundations for Financial Economics, North-Holland, Amsterdam, 1988.
4. Portfolio selection,;Markowitz;J. Finance,1952
5. H.M. Markowitz, Portfolio Selection: Efficient Diversification of Investments, Wiley, New York, 1959; Yale University Press, New Haven, 1970.