@article{PismaZhETF.21.510,
    title = {SU(5) symmetry?},
    author = {Krasnikov, N. V. and Kuz'min, V. A.},
    journal = {Письма в ЖЭТФ},
    volume = {21},
    issue = {8},
    pages = {510},
    year = {1975},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_22473.shtml},
}