@Article{ 
  AccPra15,
  author = { Acciaio, Beatrice and Pratelli, Aldo },
  title = { On the minimization of area among chord-convex sets },
  journal = { Internat. Ser. Numer. Math. },
  year = { 2015 },
  pages = {  },
  URL = { http://cvgmt.sns.it/paper/2626/ },
  note = { cvgmt preprint}
}