@article{PismaZhETF.16.133,
    title = {Singularities of the Sound Attenuation Coefficient in a Phase Transition of Order 2.5},
    author = {Davydov, V. N. and Kaganov, M. I.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {16},
    issue = {3},
    pages = {133},
    year = {1972},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_26750.shtml},
}