@article{JETPL.110.449,
    title = {},
    author = {Kostin, V. A. and Vvedenskii, N. V.},
    journal = {JETP Lett.},
    volume = {110},
    issue = {7},
    pages = {457},
    year = {2019},
    doi = {},
    url = {http://jetpletters.ru/ps/dx/10.1134/S0370274X19190044},
    note = {[Pisma v ZhETF 110, 449 (2019)]}
}