@Misc{ 
  FigSha14,
  author = { Figalli, Alessio and Shahgholian, Henrik },
  title = { A general class of free boundary problems for fully nonlinear elliptic equations },
  journal = { Arch. Ration. Mech. Anal. },
  year = { 2014 },
  pages = {  },
  URL = { http://cvgmt.sns.it/paper/2360/ },
  note = { cvgmt preprint}
}