@article{JETPL.97.139,
    title = {},
    author = {,  and Kudryashov, S. I. and Seleznev, L. V. and ,  and , },
    journal = {JETP Lett.},
    volume = {97},
    issue = {3},
    pages = {121},
    year = {2013},
    doi = {},
    url = {http://jetpletters.ru/ps/dx/10.7868/S0370274X13030016},
    note = {[Pisma v ZhETF 97, 139 (2013)]}
}