@Misc{ 
  BoBrLeVe21,
  author = { Bousquet, Pierre and Brasco, Lorenzo and Leone, Chiara and Verde, Anna },
  title = { Gradient estimates for an orthotropic nonlinear diffusion equation },
  journal = { Adv. Calc. Var. },
  year = { 2021 },
  pages = { 29 },
  URL = { http://cvgmt.sns.it/paper/5120/ },
  note = { cvgmt preprint}
}