1. Arrow, K. J. and Hahn, F. H., 1971, General Competitive Analysis, San Francisco, Holden-Day.
2. Ash, R. B., 1972, Real Analysis and Probability, New York, Academic Press. Berge, C., 1963, Topological Spaces, New York, Macmillan.
3. Billingsley, P., 1968, Convergence of Probability Measures, New York, John Wiley and Sons.
4. Breiman, L., 1968, Probability, Reading, Mass., Addison Wesley.
5. Brown, L. D. and Purves, R., 1973, “Measurable Selections of Extrema,” Ann. Stat. 1, 902–912.