@article{SM_2020_211_6_a1,
     author = {S. K. Vodopyanov and A. I. Tyulenev},
     title = {Sobolev $W^1_p$-spaces on~$d$-thick closed subsets of $\mathbb R^n$},
     journal = {Sbornik. Mathematics},
     pages = {786--837},
     year = {2020},
     volume = {211},
     number = {6},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_2020_211_6_a1/}
}