@article{PismaZhETF.3.439,
    title = {Maximum Temperature of Thermal Radiation},
    author = {Sakharov, A. D.},
    journal = {Письма в ЖЭТФ},
    volume = {3},
    issue = {11},
    pages = {439},
    year = {1966},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_24793.shtml},
}