1. Amann H., Order structures and fixed points, Mathematisches Institut, Ruhr-Universität, Bochum (preprint).
2. Some discontinuous variational problems;Ambrosetti;Diff. Integral Eqns,1988
3. Differential Inclusions Set-Valued Maps and Viability Theory;Aubin,1984
4. Differential inclusions in Banach spaces;Blasi;J. diff. Eqns,1987