@article{JETPL.108.670,
    title = {},
    author = {,  and ,  and ,  and Trakhtenberg, L. I.},
    journal = {JETP Lett.},
    volume = {108},
    issue = {9},
    pages = {637},
    year = {2018},
    doi = {},
    url = {http://jetpletters.ru/ps/dx/10.1134/S0370274X18210130},
    note = {[Pisma v ZhETF 108, 670 (2018)]}
}