@article{JETPL.102.536,
    title = {},
    author = {Tikhonov, A. M. and Asadchikov, V. E. and Volkov, Yu. O.},
    journal = {JETP Lett.},
    volume = {102},
    issue = {7},
    pages = {478},
    year = {2015},
    doi = {},
    url = {http://jetpletters.ru/ps/dx/10.7868/S0370274X15190157},
    note = {[Pisma v ZhETF 102, 536 (2015)]}
}