@Article{ 
  TyuVod21,
  author = { Tyulenev, Alexander and Vodop'yanov, Sergey },
  title = { Sobolev $W^{1}_{p}$-spaces on $d$-thick closed subsets of $\mathbb{R}^{n}$ },
  journal = { Sbornik:Mathematics },
  year = { 2020 },
  doi = { https://doi.org/10.1070/SM9199 },
  volume = { 211 },
  number = { 6 },
  pages = { 786-837 },
  URL = { http://cvgmt.sns.it/paper/5364/ },
  note = { cvgmt preprint}
}