@Misc{ 
  BecMin18,
  author = { Beck, Lisa and Mingione, Giuseppe },
  title = { Optimal Lipschitz criteria and local estimates for non-uniformly
  elliptic problems },
  journal = {  },
  year = { 2018 },
  pages = {  },
  URL = { http://cvgmt.sns.it/paper/3951/ },
  note = { cvgmt preprint}
}