@article{JETPL.109.340,
    title = {},
    author = {Ermakov, Yu. A. and Asadchikov, V. E. and Volkov, Yu. O. and ,  and Roshchin, B. S. and ,  and Tikhonov, A. M.},
    journal = {JETP Lett.},
    volume = {109},
    issue = {5},
    pages = {334},
    year = {2019},
    doi = {},
    url = {http://jetpletters.ru/ps/dx/10.1134/S0370274X19050126},
    note = {[Pisma v ZhETF 109, 340 (2019)]}
}