@article{JETPL.96.14,
    title = {},
    author = {Troitsky, S. V.},
    journal = {JETP Lett.},
    volume = {96},
    issue = {1},
    pages = {13},
    year = {2012},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_29852.shtml},
    note = {[Pisma v ZhETF 96, 14 (2012)]}
}