@article{JETPL.100.648,
    title = {},
    author = {,  and ,  and Davydov, A. B. and , },
    journal = {JETP Lett.},
    volume = {100},
    issue = {9},
    pages = {570},
    year = {2014},
    doi = {},
    url = {http://jetpletters.ru/ps/dx/10.7868/S0370274X14210073},
    note = {[Pisma v ZhETF 100, 648 (2014)]}
}