1. Moreau, J.J.: Inf-convolutions, sous-additivité, convexité des functions numériques. J. Math. pures et appl. 49, 109–154 (1970)
2. Dolecki, S., Kurcyusz, S.: On
$$\phi $$
ϕ
-convexity in extremal problems. SIAM J. Control Optim. 16, 277–300 (1978)
3. Rubinov, A.M.: Abstract Convexity and Global Optimization. Kluwer Academic, Dordrecht (2000)
4. Pallaschke, D., Rolewicz, S.: Foundations of Mathematical Optimization. Kluwer Academic, Dordrecht (1997)
5. von Neumann, J.: Zur Theorie der Gesellschaftspiele. Math. Ann. 100, 295–320 (1928). English translation: On the theory of games of strategy. Contributions to the theory of games vol. 4, pp. 13–42. Princeton, Princeton. Univ. Press (1959)