@article{JETPL.93.765,
    title = {},
    author = {Zakharov, B. G.},
    journal = {JETP Lett.},
    volume = {93},
    issue = {12},
    pages = {683},
    year = {2011},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_29405.shtml},
    note = {[Pisma v ZhETF 93, 765 (2011)]}
}