@article{DAN_1984_274_3_a4,
     author = {V. G. Kurbatov},
     title = {Local {Fredholm} property of a difference operator},
     journal = {Doklady Akademii Nauk},
     pages = {534--536},
     year = {1984},
     volume = {274},
     number = {3},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1984_274_3_a4/}
}