@Article{ 
  acefusmor11a,
  author = { Acerbi, Emilio and Fusco, Nicola and Morini, Massimiliano },
  title = { Minimality via second variation for a nonlocal isoperimetric problem },
  journal = { Communications in Mathematical Physics },
  year = { 2013 },
  volume = { 322 },
  pages = { 515--557 },
  URL = { http://cvgmt.sns.it/paper/540/ },
  note = { cvgmt preprint}
}