@article{JETPL.104.570,
    title = {},
    author = {Beltukov, Y. M. and , },
    journal = {JETP Lett.},
    volume = {104},
    issue = {8},
    pages = {552},
    year = {2016},
    doi = {},
    url = {http://jetpletters.ru/ps/dx/10.7868/S0370274X16200066},
    note = {[Pisma v ZhETF 104, 570 (2016)]}
}