@article{TMF_2010_164_1_a3,
     author = {T. H. Rasulov},
     title = {Study of the~essential spectrum of a~matrix operator},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
     pages = {62--77},
     publisher = {mathdoc},
     volume = {164},
     number = {1},
     year = {2010},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_2010_164_1_a3/}
}