@article{DAN_1986_289_1_a7,
     author = {V. N. Konovalov},
     title = {Criteria for the extension of {Sobolev} spaces $W_\infty^{(r)}(\Omega)$  for bounded plane domains},
     journal = {Doklady Akademii Nauk},
     pages = {36--38},
     publisher = {mathdoc},
     volume = {289},
     number = {1},
     year = {1986},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1986_289_1_a7/}
}