@Article{ 
  brafra03,
  author = { Braides, Andrea and Francfort, Gilles A. },
  title = { Bounds on the effective behavior of a square conducting lattice },
  journal = { Proc. R. Soc. London A. },
  year = { 2004 },
  volume = { 460 },
  pages = { 1755-1769  },
  URL = { http://cvgmt.sns.it/paper/1452/ },
  note = { cvgmt preprint}
}