1. Akerlof, G. A.: The Market for Lemmons’: Quality Uncertainty and the Market Mechanism, in: Quarterly Journal of Economics 84, 1970, pp. 488–500.
2. Arrow, K.J.: The Economics of Agency, in: Pratt, J.W., and Zeckhauser, R.J. (eds.): Principals and Agents: The Structure of Business, Boston 1985.
3. Barnea, A., Haugen, R., and Senbet, L.: Agency Problems and Financial Contracting, Englewood Cliffs 1985.
4. Barry, C. B.: Portfolio Analysis under Uncertain Means, Variances, and Covariances, in: Journal of Finance 29, 1974, pp. 515–522.
5. Bawa, V. S.: Portfolio Choice and Capital Market Equilibrium with Unknown Distributions, in: Bawa, V. S., Brown, S. J., and Klein, R. W., 1979, pp. 94–108.