@article{DAN_1971_201_5_a13,
     author = {P. E. Sobolevskii},
     title = {On coercive solvability of difference equations},
     journal = {Doklady Akademii Nauk},
     pages = {1063--1066},
     publisher = {mathdoc},
     volume = {201},
     number = {5},
     year = {1971},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1971_201_5_a13/}
}