@article{PismaZhETF.28.393,
    title = {Lifetime of roton in liquid helium},
    author = {Blagoveshchenskii, N. M. and Dokukin, E. B.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {28},
    issue = {6},
    pages = {393},
    year = {1978},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_24171.shtml},
}