@article{PismaZhETF.5.434,
    title = {Phonon Spectrum of the Superconducting  Modification of Bismuth},
    author = {Zavaritskii, N. V.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {5},
    issue = {12},
    pages = {434},
    year = {1967},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_25224.shtml},
}