@article{FAA_2018_52_1_a9,
     author = {V. S. Rabinovich},
     title = {Essential {Spectrum} of {Schr\"odinger} {Operators} on {Periodic} {Graphs}},
     journal = {Funkcionalʹnyj analiz i ego prilo\v{z}eni\^a},
     pages = {80--84},
     publisher = {mathdoc},
     volume = {52},
     number = {1},
     year = {2018},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/FAA_2018_52_1_a9/}
}