@article{PismaZhETF.54.208,
    title = {Induced focusing of electromagnetic wave in a wake plasma wave},
    author = {Bulanov, S. V. and Sakharov, A. S.},
    journal = {Письма в ЖЭТФ},
    volume = {54},
    issue = {4},
    pages = {208},
    year = {1991},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_18121.shtml},
}