00332nam a2200121Ia 4500082002000000100002900020245004400049260003600093300002900129490004200158500000500200700000500205  a519.91bC597.NA  aClarke, F. H. and others  aNonsmooth analysis and control theoryb  aNew YorkbSpringer-Verlagc1998  axiii, 276p. Index, Bibl.  aGraduate texts in Mathematics, v. 178  a  a