@article{JETPL.104.203,
    title = {},
    author = {Boev, M. V. and Kovalev, V. M. and Chaplik, A. V.},
    journal = {JETP Lett.},
    volume = {104},
    issue = {3},
    pages = {204},
    year = {2016},
    doi = {},
    url = {http://jetpletters.ru/ps/dx/10.7868/S0370274X16150133},
    note = {[Pisma v ZhETF 104, 203 (2016)]}
}