@article{DE_1983_19_8_a22,
     author = {A. G. Kamenskii},
     title = {A counterexample in the theory of difference operators},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1457--1458},
     publisher = {mathdoc},
     volume = {19},
     number = {8},
     year = {1983},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1983_19_8_a22/}
}