@article{PismaZhETF.9.480,
    title = {Electrosonic Waves in a Plasma with Negative Dielectric Constant},
    author = {Karpman, V. I.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {9},
    issue = {8},
    pages = {480},
    year = {1969},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_25393.shtml},
}