[1] J. P. AUBIN: Mathematical Methods in Game and Economic Theory. Studies in Math, and its Applications, Vol. 7, North-Holland, Amsterdam (1979). MR 0556865

[2] J. DIEUDONNÉ: Sur la separation des ensembles convexes. Math. Annalen 163 (1966), 1-3. MR 0194865

[3] P. J. LAURENT: Approximation et Optimisation. Hermann, Paris (1972). MR 0467080 | Zbl 0238.90058

[4] R. T. ROCKAFELLAR: Convex Analysis. Princeton Univ. Press, Princeton. MR 1451876 | Zbl 1011.49013

[5] R. T. ROCKAFELLAR: Level sets and continuity of conjugate convex functions. Trans. Amer. Math. Soc. 123 (1966), 46-63. MR 0192318 | Zbl 0145.15802