@article{JETPL.104.745,
    title = {},
    author = {Val?kov, V. V. and Dzebisashvili, D. M. and , },
    journal = {JETP Lett.},
    volume = {104},
    issue = {10},
    pages = {730},
    year = {2016},
    doi = {},
    url = {http://jetpletters.ru/ps/dx/10.7868/S0370274X16220148},
    note = {[Pisma v ZhETF 104, 745 (2016)]}
}