Papageorgiou, Nikolaos S.; Smyrlis, George: A multiplicity theorem for the Neumann problem for nonlinear hemivariational inequalities.
(English).
In:
Kuben, J.
and Vosmanský, J. (eds.): Equadiff 10, Czechoslovak International Conference on Differential Equations and Their Applications, Prague, August 27-31, 2001.
[Part 2] Papers.
Masaryk University, Brno, 2002.
pp. 327-337