@article{MZM_2017_102_5_a9,
     author = {V. S. Rabinovich},
     title = {Essential {Spectrum} of {Schr\"{o}dinger} {Operators
}},
     journal = {Matemati\v{c}eskie zametki},
     pages = {761--774},
     publisher = {mathdoc},
     volume = {102},
     number = {5},
     year = {2017},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_2017_102_5_a9/}
}