@article{JETPL.104.860,
    title = {},
    author = {,  and ,  and , },
    journal = {JETP Lett.},
    volume = {104},
    issue = {12},
    pages = {842},
    year = {2016},
    doi = {},
    url = {http://jetpletters.ru/ps/dx/10.7868/S0370274X1624005X},
    note = {[Pisma v ZhETF 104, 860 (2016)]}
}