@article{PismaZhETF.50.18,
    title = {Electron sound in metals},
    author = {Burma, N. G. and Deineka, E. Yu. and Fil', V. D.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {50},
    issue = {1},
    pages = {18},
    year = {1989},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_17029.shtml},
}