@article{JETPL.97.150,
    title = {},
    author = {Boev, M. V. and Kovalev, V. M.},
    journal = {JETP Lett.},
    volume = {97},
    issue = {3},
    pages = {131},
    year = {2013},
    doi = {},
    url = {http://jetpletters.ru/ps/dx/10.7868/S0370274X1303003X},
    note = {[Pisma v ZhETF 97, 150 (2013)]}
}