@article{JETPL.114.437,
    title = {},
    author = {,  and , },
    journal = {JETP Lett.},
    volume = {114},
    issue = {7},
    pages = {380},
    year = {2021},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_34892.shtml},
    note = {[Pisma v ZhETF 114, 437 (2021)]}
}