@article{JETPL.109.447,
    title = {},
    author = {Pershin, S. M. and Grishin, M. Ya. and Lednev, V. N. and , },
    journal = {JETP Lett.},
    volume = {109},
    issue = {7},
    pages = {437},
    year = {2019},
    doi = {},
    url = {http://jetpletters.ru/ps/dx/10.1134/S0370274X19070038},
    note = {[Pisma v ZhETF 109, 447 (2019)]}
}