@article{DVMG_2023_23_1_a9,
     author = {S. M. Tashpulatov},
     title = {Structure of essential spectrum and discrete spectra of the
},
     journal = {Dalʹnevosto\v{c}nyj matemati\v{c}eskij \v{z}urnal},
     pages = {112--133},
     publisher = {mathdoc},
     volume = {23},
     number = {1},
     year = {2023},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/DVMG_2023_23_1_a9/}
}