@Article{ 
  ambcab,
  author = { Ambrosio, Luigi and Cabré, Xavier },
  title = { Entire Solutions of a Semilinear Elliptic Equation in ${\mathcal R}^3$ and a Conjecture of De Giorgi },
  journal = { Journal of the AMS },
  year = { 2000 },
  number = { 13 },
  pages = { 725-739 },
  URL = { http://cvgmt.sns.it/paper/1454/ },
  note = { cvgmt preprint}
}