@article{DAN_1962_142_2_a4,
     author = {V. \`E. Lyantse},
     title = {A generalization of the concept of spectral operator},
     journal = {Doklady Akademii Nauk},
     pages = {278--281},
     publisher = {mathdoc},
     volume = {142},
     number = {2},
     year = {1962},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1962_142_2_a4/}
}