@article{PismaZhETF.43.68,
    title = {Coherent amplification of intense nanosecond pulses in a multilevel system},
    author = {Belenov, E. M. and Kryukov, P. G. and Nazarkin, A. V. and Uskov, A. V.},
    journal = {Письма в ЖЭТФ},
    volume = {43},
    issue = {2},
    pages = {68},
    year = {1986},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_21240.shtml},
}