@article{PismaZhETF.25.144,
    title = {Absolute instability of a "trapped" packet of sound waves in an anisotropic-semiconductor plate},
    author = {Pustovoit, V. I. and Ravvin, I. S. and Chernozatonskii, L. A.},
    journal = {Письма в ЖЭТФ},
    volume = {25},
    issue = {3},
    pages = {144},
    year = {1977},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_21095.shtml},
}