@article{JETPL.108.42,
    title = {},
    author = {,  and , },
    journal = {JETP Lett.},
    volume = {108},
    issue = {1},
    pages = {44},
    year = {2018},
    doi = {},
    url = {http://jetpletters.ru/ps/dx/10.1134/S0370274X18130088},
    note = {[Pisma v ZhETF 108, 42 (2018)]}
}