@article{JETPL.116.857,
    title = {},
    author = {Val?kov, V. V.},
    journal = {JETP Lett.},
    volume = {116},
    issue = {12},
    pages = {896},
    year = {2022},
    doi = {},
    url = {http://jetpletters.ru/ps/dx/10.31857/S1234567822240089},
    note = {[Pisma v ZhETF 116, 857 (2022)]}
}