@article{JETPL.109.540,
    title = {},
    author = {,  and Popov, V. V. and ,  and Ivanov, A. A. and Kuznetsov, A. V. and ,  and ,  and , },
    journal = {JETP Lett.},
    volume = {109},
    issue = {8},
    pages = {529},
    year = {2019},
    doi = {},
    url = {http://jetpletters.ru/ps/dx/10.1134/S0370274X19080095},
    note = {[Pisma v ZhETF 109, 540 (2019)]}
}