@article{JETPL.101.596,
    title = {},
    author = {Prudnikov, P. V. and Prudnikov, V. V. and Popov, I. S.},
    journal = {JETP Lett.},
    volume = {101},
    issue = {8},
    pages = {539},
    year = {2015},
    doi = {},
    url = {http://jetpletters.ru/ps/dx/10.7868/S0370274X15080068},
    note = {[Pisma v ZhETF 101, 596 (2015)]}
}