@article{PismaZhETF.13.511,
    title = {Amplification of High-frequency Phonons in the Field of an Electromagnetic Wave},
    author = {Epshtein, E. M.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {13},
    issue = {9},
    pages = {511},
    year = {1971},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_24324.shtml},
}