-
ANANE, A. and GOSSEZ, J. P. (1990) Strongly nonlinear elliptic problems near resonance: a variational approach. Comm. Partial Diff. Eqns 15, 1141-1159.
-
ARCOYA, D. and ORSINA, L. (1997) Landesman-Lazer conditions and quasi-linear elliptic equations. Nonlinear Anal. 28, 1623-1632.
-
BAIOCCHI, C., BUTTAZZO, G., GASTALDI, F. and TOMARELLI, F. (1988) General existence theorems for unilateral problems in continuum mechanics. Arch. Rational Mech. Anal. 100, 149-188.
-
BOUCHALA, J. and DRABEK, P. (2000) Strong resonance for some quasilinear elliptic equations. J. Math. Anal. Appl. 245, 7-19.
-
BROWDER, F.E. and HESS, P. (1972) Nonlinear mappings of monotone type in Banach spaces. J. Fund. Anal 11, 251-294.
-
CHANG, K.C. (1981) Variational methods for non-differentiable functional and their applications to partial differential equations. J. Math. Anal. Appl. 80, 102-129.
-
CLARKE, F.H. (1983) Optimization and Nonsmooth Analysis. John Wiley & Sons, New York.
-
DUVAUT, G. and LIONS, J.L. (1972) Les Inéquations en Mécanique et en Physique. Dunod, Paris.
-
EKELAND, I. and TEMAM, R. (1976) Convex Analysis and Variational Problems. North-Holland, Amsterdam - New York.
-
GASIŃSKI, L. and PAPAGEORGIOU, N.S. (2001a) An existence theorem for nonlinear hemivariational inequalities at resonance. Bull. Austr. Math. Soc. 63, 1-14.