@article{JETPL.93.228,
    title = {},
    author = {,  and Magarill, L. I. and Chaplik, A. V.},
    journal = {JETP Lett.},
    volume = {93},
    issue = {4},
    pages = {209},
    year = {2011},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_29161.shtml},
    note = {[Pisma v ZhETF 93, 228 (2011)]}
}