[1] Allen G.: 
Variational inequalities, complementarity problems, and duality theorems. J. Math. Anal. Appl. 58 (1977), 1-10. 
MR 0513305 | 
Zbl 0383.49005[2] Fan K.: 
A minimax inequality and applications, Inequalities. Vol III, (Ed. O. Shisha), New York, London, Academic Press 13, 1972, pp. 103-113. 
MR 0341029[3] Fan K.: 
Some properties of convex sets related to fixed point theorems. Math. Ann. 266 (1984), 519-537. 
MR 0735533 | 
Zbl 0515.47029[4] Knaster B., Kuratowski C, Mazurkiewicz S.: Ein Beweis des Fixpunktsatzes für n-dimensionale Simplexe. Fund. Math. 14 (1929), 132-137.
[5] Lin T. C.: 
Convex sets, fixed points, variational and minimax inequalities. Bull. Austral. Math. Soc. 34 (1986), 107-117. 
MR 0847978 | 
Zbl 0597.47038[6] Tarafdar E.: 
A fixed point theorem equivalent to Fan-Knaster-Kuratowski-Mazurkiewic's theorem. J. Math. Anal. Appl. 128 (1987), 475-479. 
MR 0917380[7] Tarafdar E.: 
On nonlinear variational inequalities. Proc. Amer. Math. Soc. 67 (1977), 95-98. 
MR 0467408 | 
Zbl 0369.47029[8] Tarafdar E.: 
Variational problems via a fixed point theorem. Indian Journal of Mathematics 28 (1986), 229-240. 
MR 0900728 | 
Zbl 0641.49005