@article{JETPL.104.512,
    title = {},
    author = {Val?kov, V. V. and , },
    journal = {JETP Lett.},
    volume = {104},
    issue = {7},
    pages = {483},
    year = {2016},
    doi = {},
    url = {http://jetpletters.ru/ps/dx/10.7868/S0370274X16190085},
    note = {[Pisma v ZhETF 104, 512 (2016)]}
}