@article{PismaZhETF.6.829,
    title = {Self-modulation of Nonlinear Plane Waves in Dispersive Media},
    author = {Karpman, V. I.},
    journal = {Письма в ЖЭТФ},
    volume = {6},
    issue = {8},
    pages = {829},
    year = {1967},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_25503.shtml},
}