@article{JETPL.113.68,
    title = {},
    author = {,  and ,  and , },
    journal = {JETP Lett.},
    volume = {113},
    issue = {1},
    pages = {61},
    year = {2021},
    doi = {},
    url = {http://jetpletters.ru/ps/dx/10.31857/S1234567821010109},
    note = {[Pisma v ZhETF 113, 68 (2021)]}
}