@article{INTO_2023_221_a2,
     author = {A. D. Bendikov},
     title = {On the spectrum of hierarchical {Schr\"{o}dinger-type
}},
     journal = {Itogi nauki i tehniki. Sovremenna\^a matematika i e\"e prilo\v{z}eni\^a. Temati\v{c}eskie obzory},
     pages = {20--30},
     publisher = {mathdoc},
     volume = {221},
     year = {2023},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/INTO_2023_221_a2/}
}