@article{JETPL.107.298,
    title = {},
    author = {Pekh, P. L. and Ratnikov, P. V.},
    journal = {JETP Lett.},
    volume = {107},
    issue = {5},
    pages = {282},
    year = {2018},
    doi = {},
    url = {http://jetpletters.ru/ps/dx/10.7868/S0370274X1805003X},
    note = {[Pisma v ZhETF 107, 298 (2018)]}
}