@Article{ 
  BraPia12,
  author = { Braides, Andrea and Piatnitski, Andrey },
  title = { Variational problems with percolation: dilute spin systems at zero temperature },
  journal = { J. Stat. Phys. },
  year = { 2012 },
  doi = { 10.1007/s10955-012-0628-1 },
  volume = { 149 },
  pages = { 846-864 },
  URL = { http://cvgmt.sns.it/paper/2002/ },
  note = { cvgmt preprint}
}