@article{SM_1990_66_1_a4,
     author = {B. P. Allakhverdiev and G. Sh. Guseinov},
     title = {On the spectral theory of dissipative difference operators of second order},
     journal = {Sbornik. Mathematics},
     pages = {107--125},
     publisher = {mathdoc},
     volume = {66},
     number = {1},
     year = {1990},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1990_66_1_a4/}
}