@article{JETPL.110.266,
    title = {},
    author = {,  and ,  and ,  and ,  and ,  and , },
    journal = {JETP Lett.},
    volume = {110},
    issue = {4},
    pages = {290},
    year = {2019},
    doi = {},
    url = {http://jetpletters.ru/ps/dx/10.1134/S0370274X19160100},
    note = {[Pisma v ZhETF 110, 266 (2019)]}
}