@article{DAN_1987_297_3_a9,
     author = {S. P. Shishatskii},
     title = {Interior problems for elliptic and parabolic equations, and},
     journal = {Doklady Akademii Nauk},
     pages = {556--558},
     publisher = {mathdoc},
     volume = {297},
     number = {3},
     year = {1987},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1987_297_3_a9/}
}