@article{PismaZhETF.34.358,
    title = {Collective excitations in a Bose gas of a spin-polarized atomic hydrogen},
    author = {Kagan, Yu. and Shlyapnikov, G. V.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {34},
    issue = {6},
    pages = {358},
    year = {1981},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_23186.shtml},
}