@article{ZAA_2000__19_2_48699,
     author = {Kilpel\"ainen, T. and Mal\'y, J.},
     title = {Sobolev inequalities on sets with irregular boundaries.},
     journal = {Zeitschrift f\"ur Analysis und ihre Anwendungen},
     pages = {369--380},
     publisher = {mathdoc},
     volume = {19},
     number = {2},
     year = {2000},
     zbl = {0959.46020},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/ZAA_2000__19_2_48699/}
}