@article {GrGuSaZh12,
    AUTHOR = {Greuet, Aur{\'e}lien and Guo, Feng and Safey El Din, Mohab and
              Zhi, Lihong},
     TITLE = {Global optimization of polynomials restricted to a smooth
              variety using sums of squares},
   JOURNAL = {J. Symbolic Comput.},
  FJOURNAL = {Journal of Symbolic Computation},
    VOLUME = {47},
      YEAR = {2012},
    NUMBER = {5},
     PAGES = {503--518},
      ISSN = {0747-7171},
   MRCLASS = {13Jxx (14Pxx 68W30)},
  MRNUMBER = {2908577},
       DOI = {10.1016/j.jsc.2011.12.003},
       URL = {http://dx.doi.org/10.1016/j.jsc.2011.12.003},
}