@article{JETPL.108.369,
    title = {},
    author = {Volkov, M. K. and Pivovarov, A. A.},
    journal = {JETP Lett.},
    volume = {108},
    issue = {6},
    pages = {347},
    year = {2018},
    doi = {},
    url = {http://jetpletters.ru/ps/dx/10.1134/S0370274X18180017},
    note = {[Pisma v ZhETF 108, 369 (2018)]}
}