@article{JETPL.103.611,
    title = {},
    author = {Ashitkov, S. I. and Komarov, P. S. and Ovchinnikov, A. V. and Struleva, E. V. and Agranat, M. B.},
    journal = {JETP Lett.},
    volume = {103},
    issue = {8},
    pages = {544},
    year = {2016},
    doi = {},
    url = {http://jetpletters.ru/ps/dx/10.7868/S0370274X16080105},
    note = {[Pisma v ZhETF 103, 611 (2016)]}
}