@incollection {MR897573,
    AUTHOR = {Z{\u{a}}linescu, C.},
     TITLE = {Optimality conditions and duality for continuous time
              programming without differentiability},
 BOOKTITLE = {Distributed parameter systems ({V}orau, 1984)},
    SERIES = {Lecture Notes in Control and Inform. Sci.},
    VOLUME = {75},
     PAGES = {428--445},
 PUBLISHER = {Springer},
   ADDRESS = {Berlin},
      YEAR = {1985},
   MRCLASS = {49A34 (49A52 49A55 90C25)},
  MRNUMBER = {MR897573 (88e:49025)},
MRREVIEWER = {Guy Jumarie},
       DOI = {10.1007/BFb0005666},
       URL = {http://dx.doi.org/10.1007/BFb0005666},
}