@Misc{ 
  DiFMarZam12,
  author = { Di Fazio, Giuseppe and Maria Stella Fanciullo,  and Zamboni, Pietro },
  title = { Hölder regularity for non divergence form elliptic equations with
  discontinuous coefficients },
  journal = {  },
  year = { 2012 },
  pages = {  },
  URL = { http://cvgmt.sns.it/paper/5287/ },
  note = { cvgmt preprint}
}