1. Differential Inclusions;Aubin,1984
2. A. Cellina and C. Mariconda, Kuratowski's index of a decomposable set, Bull. Polish Acad. Sci., to appear.
3. Optimization—Theory and Applications;Cesari,1983
4. Nonlinear Functional Analysis;Deimling,1985
5. Classical solutions of differential equations with multivalued right-hand side;Filippov;SIAM J. Control,1967