@article{PismaZhETF.56.197,
    title = {Envelope solitons with different carrier frequencies in a dispersive nonlinear medium},
    author = {Khasilev, V. Ya.},
    journal = {Письма в ЖЭТФ},
    volume = {56},
    issue = {4},
    pages = {197},
    year = {1992},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_19412.shtml},
}