K. Fan, Minimax Theorems, Proc. Nat. Acad. Sci. USA, pp.42-47, 1953.

J. Neumann, Zur Theorie der Gesellschaftsspiele, Mathematische Annalen, vol.100, issue.1, pp.295-320, 1928.
DOI : 10.1007/BF01448847

M. Sion, On general minimax theorems, Pacific Journal of Mathematics, vol.8, issue.1, pp.171-176, 1958.
DOI : 10.2140/pjm.1958.8.171
URL : http://projecteuclid.org/download/pdf_1/euclid.pjm/1103040253

S. Sorin, A First Course on Zero-Sum Repeated Games, 2002.