1. Aubin JP, Ekeland I: Applied Nonlinear Analysis. Wiley, New York; 1984.
2. Kinderlehrer D, Stampacchia G Pure and Applied Mathematics 88. In An Introduction to Variational Inequalities and Their Applications. Academic Press, New York; 1980.
3. Ding XP, Tan KK: A minimax inequality with applications to existence of equilibrium point and fixed point theorems. Colloq. Math. 1992, 63(2):233–247.
4. Ansari QH, Yao JC: On nondifferentiable and nonconvex vector optimization problems. J. Optim. Theory Appl. 2000, 106(3):487–500.
5. Giannessi F: Theorems of alternative, quadratic programs and complementarity problems. In Variational Inequalities and Complementarity Problems. Edited by: Cottle RW, Giannessi F, Lions JL. Wiley, New York; 1980:151–186.