1. Browder F. E., Petryshyn W. V.,Construction of fixed points of nonlinear mappings in Hilbert spaces, J. Math. Anal. Appl.20 (1967), 197–228.
2. Glowinski R.,Numerical Methods for Nonlinear Variational Problems, Springer-Verlag, New York, 1984.
3. Glowinski R., Lions J. L., Tremolieres R.,Numerical Analysis of Variational Inequalities, North-Holland, Amsterdam, 1981.
4. Kinderlehrer D., Stampacchia G.,An Introduction to Variational Inequalities and their Applications, Academic Press, New York, 1980.
5. Kirk W. A.,Remarks on pseudo-contractive mappings, Proc. Amer. Math. Soc.25 (1970), 821–823.