@article{PismaZhETF.27.665,
    title = {Condensation of photons in the hot universe and longitudinal relict radiation},
    author = {Kuz'min, V. A. and Shaposhnikov, M. E.},
    journal = {Письма в ЖЭТФ},
    volume = {27},
    issue = {11},
    pages = {665},
    year = {1978},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_23799.shtml},
}