@article{DAN_1958_118_2_a9,
     author = {L. N. Slobodetskiǐ},
     title = {S.\,L.~Sobolev's spaces of fractional order and their application to boundary problems for partial differential equations},
     journal = {Doklady Akademii Nauk},
     pages = {243--246},
     publisher = {mathdoc},
     volume = {118},
     number = {2},
     year = {1958},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1958_118_2_a9/}
}