@article {MR2740521,
    AUTHOR = {Voisei, M. D. and Z{\u{a}}linescu, C.},
     TITLE = {Counterexamples to some triality and tri-duality results},
   JOURNAL = {J. Global Optim.},
  FJOURNAL = {Journal of Global Optimization. An International Journal
              Dealing with Theoretical and Computational Aspects of Seeking
              Global Optima and Their Applications in Science, Management
              and Engineering},
    VOLUME = {49},
      YEAR = {2011},
    NUMBER = {1},
     PAGES = {173--183},
      ISSN = {0925-5001},
     CODEN = {JGOPEO},
   MRCLASS = {90C46 (90C48)},
  MRNUMBER = {2740521 (2011k:90184)},
       DOI = {10.1007/s10898-010-9592-y},
       URL = {http://dx.doi.org/10.1007/s10898-010-9592-y},
}