@article{JETPL.104.349,
    title = {},
    author = {Balygin, K. A. and ,  and Kulik, S. P. and Molotkov, S. N.},
    journal = {JETP Lett.},
    volume = {104},
    issue = {5},
    pages = {341},
    year = {2016},
    doi = {},
    url = {http://jetpletters.ru/ps/dx/10.7868/S0370274X16170112},
    note = {[Pisma v ZhETF 104, 349 (2016)]}
}