@article{MZM_1973_13_2_a13,
     author = {V. \`E. Lyantse and I. P. Syroid},
     title = {Conditions under which an~operator obtained as a~perturbation of multiplication by the independent variable is spectral},
     journal = {Matemati\v{c}eskie zametki},
     pages = {289--296},
     publisher = {mathdoc},
     volume = {13},
     number = {2},
     year = {1973},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1973_13_2_a13/}
}