@article{JETPL.101.724,
    title = {},
    author = {,  and ,  and ,  and Zotov, A.},
    journal = {JETP Lett.},
    volume = {101},
    issue = {9},
    pages = {648},
    year = {2015},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_31274.shtml},
    note = {[Pisma v ZhETF 101, 724 (2015)]}
}