@article{JETPL.101.294,
    title = {},
    author = {Ashitkov, S. I. and Komarov, P. S. and Struleva, E. V. and ,  and , },
    journal = {JETP Lett.},
    volume = {101},
    issue = {4},
    pages = {276},
    year = {2015},
    doi = {},
    url = {http://jetpletters.ru/ps/dx/10.7868/S0370274X15040128},
    note = {[Pisma v ZhETF 101, 294 (2015)]}
}