1. Set-relations and optimality conditions in set-valued maps;Alonso;Nonlinear Anal.,2005
2. Set-Valued Analysis;Aubin,1990
3. Optimization and Nonsmooth Analysis;Clarke,1983
4. Multivalued Differential Equations;Deimling,1992
5. Variational Methods in Partially Ordered Spaces;Gopfert,2003