@Misc{ 
  Bor17f,
  author = { Borrelli, William },
  title = { Stationary solutions for the 2D critical Dirac equation with Kerr nonlinearity },
  journal = { Journal of Differential Equations },
  year = { 2017 },
  pages = {  },
  URL = { http://cvgmt.sns.it/paper/3585/ },
  note = { cvgmt preprint}
}