@article{JETPL.101.426,
    title = {},
    author = {,  and ,  and Kudryashov, S. I. and ,  and ,  and ,  and ,  and ,  and ,  and Alferov, S. V. and ,  and ,  and Kuchmizhak, A. A. and ,  and , },
    journal = {JETP Lett.},
    volume = {101},
    issue = {6},
    pages = {394},
    year = {2015},
    doi = {},
    url = {http://jetpletters.ru/ps/dx/10.7868/S0370274X15060077},
    note = {[Pisma v ZhETF 101, 426 (2015)]}
}