@article{PismaZhETF.31.7,
    title = {Investigation of single-atom scattering of neutrons and of the branch of  the two-roton bound state in He II},
    author = {Blagoveshchenskii, N. M. and Dokukin, E. B. and Kozlov, Zh. A. and Parfenov, V. A.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {31},
    issue = {1},
    pages = {7},
    year = {1980},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_20224.shtml},
}