@article{PismaZhETF.11.153,
    title = {Self-focusing Filaments as a Result of the Motion of Focal Points},
    author = {Korobkin, V. V. and Prokhorov, A. M. and Serov, R. V. and Shchelev, M. Ya.},
    journal = {Письма в ЖЭТФ},
    volume = {11},
    issue = {3},
    pages = {153},
    year = {1970},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_26078.shtml},
}