@article{DAN_1968_183_2_a12,
     author = {B. Sternin},
     title = {Boundary value problems of {Sobolev} type for elliptic operators},
     journal = {Doklady Akademii Nauk},
     pages = {296--299},
     publisher = {mathdoc},
     volume = {183},
     number = {2},
     year = {1968},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1968_183_2_a12/}
}