@article{PismaZhETF.33.511,
    title = {Two-dimensional rotons near a helium II-solid boundary},
    author = {Bondarev, V. N.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {33},
    issue = {10},
    pages = {511},
    year = {1981},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_23069.shtml},
}