@article{JETPL.103.657,
    title = {},
    author = {,  and ,  and , },
    journal = {JETP Lett.},
    volume = {103},
    issue = {9},
    pages = {577},
    year = {2016},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_31797.shtml},
    note = {[Pisma v ZhETF 103, 657 (2016)]}
}