@Misc{ 
  NguSqu17b,
  author = { Nguyen, Hoai-Minh and Squassina, Marco },
  title = { On anisotropic Sobolev spaces },
  journal = {  },
  year = { 2017 },
  pages = { 10 },
  URL = { http://cvgmt.sns.it/paper/3595/ },
  note = { cvgmt preprint}
}