@article{PismaZhETF.17.424,
    title = {Gravitational   Interaction   of  Zero-mass   Particles},
    author = {Andreev, A. F.},
    journal = {Письма в ЖЭТФ},
    volume = {17},
    issue = {8},
    pages = {424},
    year = {1973},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_23585.shtml},
}