1. J. P. Aubin: “Applied Abstract Analysis”, Wiley, New York (1977).
2. R. Aumann: “Integrals of set valued functions”, J. Math. Anal. Appl. 12(1965), 1–12.
3. R. Rumann L. Shapley: “Values of Nonatomic Games”, Princeton Univ. Press, Princeton (1974).
4. J. Borwein: “Convex relations in analysis and optimization” in “Generalized concavity in optimization and economics”, eds. Schaible-Ziemba, Acad. Press, N.Y. (1980).
5. C. Castaing M. Valadier: “Convex Analysis and Measurable Multifunctions”, Lecture Notes in Math. Vol 580, Springer, Berlin (1977).