@article{PismaZhETF.10.482,
    title = {Fourth Sound in Fermi-Bose Quantum Liquids},
    author = {Sanikidze, D. G. and Shaanova, A. N.},
    journal = {Письма в ЖЭТФ},
    volume = {10},
    issue = {10},
    pages = {482},
    year = {1969},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_25763.shtml},
}