@article {MR605758,
    AUTHOR = {Z{\u{a}}linescu, Constantin},
     TITLE = {On an abstract control problem},
   JOURNAL = {Numer. Funct. Anal. Optim.},
  FJOURNAL = {Numerical Functional Analysis and Optimization},
    VOLUME = {2},
      YEAR = {1980},
    NUMBER = {6},
     PAGES = {531--542 (1981)},
      ISSN = {0163-0563},
     CODEN = {NFADDL},
   MRCLASS = {49A51 (90C25)},
  MRNUMBER = {MR605758 (82d:49015)},
MRREVIEWER = {Jean-Paul Penot},
       DOI = {10.1080/01630568008816074},
       URL = {http://dx.doi.org/10.1080/01630568008816074},
}