@article{MZM_2021_110_6_a12,
     author = {V. S. Budyka and M. M. Malamud},
     title = {On the {Discreteness} of the {Spectrum} of {Matrix} {Schr\"odinger} and {Dirac} {Operators} with {Point} {Interactions}},
     journal = {Matemati\v{c}eskie zametki},
     pages = {932--938},
     publisher = {mathdoc},
     volume = {110},
     number = {6},
     year = {2021},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_2021_110_6_a12/}
}