@article{JETPL.98.261,
    title = {},
    author = {,  and Kats, E. I. and ,  and ,  and ,  and , },
    journal = {JETP Lett.},
    volume = {98},
    issue = {4},
    pages = {233},
    year = {2013},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_30401.shtml},
    note = {[Pisma v ZhETF 98, 261 (2013)]}
}