@article{ZNSL_2008_357_a3,
     author = {I. N. Demshin and V. A. Shlyk},
     title = {On the invariance of compacts generating normal ring open sets under quasiisometries},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {46--53},
     publisher = {mathdoc},
     volume = {357},
     year = {2008},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_2008_357_a3/}
}