@article{PismaZhETF.61.887,
    title = {Optical pulsecollapse in defocusing active medium},
    author = {Kramer, L. and Kuznetsov, E. A. and Рорр, S. and Turitsyn, S. K.},
    journal = {Письма в ЖЭТФ},
    volume = {61},
    issue = {11},
    pages = {887},
    year = {1995},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_14290.shtml},
}