1. Blum, E., and Oettli, W., From Optimization and Variational Inequalities to Equilibrium Problems, Mathematics Student, Vol. 63, pp. 123–145, 1994.
2. Noor, M. A., and Oettli, W., On General Nonlinear Complementarity Problems and Quasi-Equilibria, Le Matematiche (Catania), Vol. 49, pp. 313–331, 1994.
3. Flores-bazan, F., Existence Theorems for Generalized Noncoercive Equilibrium Problems: The Quasiconvex Case, SIAM Journal on Optimization, Vol. 11, pp. 675–690, 2000.
4. Mosco, U., Implicit Variational Problems and Quasivariational Inequalities, Lecture Notes in Mathematics, Springer Verlag, Berlin, Germany, Vol. 543, pp. 83–126, 1976.
5. Giannessi, F., Maugeri, A., and Pardalos, P. M., Equilibrium Problems: Nonsmooth Optimization and Variational Inequality Models, Kluwer Academic Publishers, Dordrecht, Holland, 2001.