@article{JETPL.97.24,
    title = {},
    author = {Petrov, Yu. V. and Inogamov, N. A. and Migdal, K. P.},
    journal = {JETP Lett.},
    volume = {97},
    issue = {1},
    pages = {20},
    year = {2013},
    doi = {},
    url = {http://jetpletters.ru/ps/dx/10.7868/S0370274X13010050},
    note = {[Pisma v ZhETF 97, 24 (2013)]}
}