@article{JETPL.110.95,
    title = {},
    author = {Pekh, P. L. and Ratnikov, P. V.},
    journal = {JETP Lett.},
    volume = {110},
    issue = {2},
    pages = {111},
    year = {2019},
    doi = {},
    url = {http://jetpletters.ru/ps/dx/10.1134/S0370274X19140054},
    note = {[Pisma v ZhETF 110, 95 (2019)]}
}