@article{PismaZhETF.18.693,
    title = {Localized states of rotons near ions in helium II},
    author = {Bondarev, V. N},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {18},
    issue = {11},
    pages = {693},
    year = {1973},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_26641.shtml},
}