@article{JETPL.105.34,
    title = {},
    author = {Ishkhanyan, A. M. and Krainov, V. P.},
    journal = {JETP Lett.},
    volume = {105},
    issue = {1},
    pages = {43},
    year = {2017},
    doi = {},
    url = {http://jetpletters.ru/ps/dx/10.7868/S0370274X1701009X},
    note = {[Pisma v ZhETF 105, 34 (2017)]}
}