@Article{ 
  FocGerSpa18,
  author = { Focardi, Matteo and Geraci, Francesco and Spadaro, Emanuele },
  title = { Quasi-monotonicity formulas for classical obstacle problems with Sobolev coefficients and applications },
  journal = { JOTA },
  year = { 2018 },
  pages = {  },
  URL = { http://cvgmt.sns.it/paper/3893/ },
  note = { cvgmt preprint}
}