@article{DAN_1967_173_6_a7,
     author = {V. \`E. Lyantse},
     title = {A non-selfadjoint difference operator},
     journal = {Doklady Akademii Nauk},
     pages = {1260--1263},
     year = {1967},
     volume = {173},
     number = {6},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1967_173_6_a7/}
}