@Article{ 
  DeSTor19,
  author = { De Silva, Daniela and Tortone, Giorgio },
  title = { Improvement of flatness for vector valued free boundary problems },
  journal = { Mathematics in Engineering },
  year = { 2020 },
  doi = { 10.3934/mine.2020027 },
  pages = {  },
  URL = { http://cvgmt.sns.it/paper/6275/ },
  note = { cvgmt preprint}
}