@article{PismaZhETF.33.560,
    title = {Phenomenology of a $\tau$-lepton with a heavy neutrino in the SU(5) model},
    author = {Zelenov, E. V. and Kalashnikov, O. K.},
    journal = {Письма в ЖЭТФ},
    volume = {33},
    issue = {10},
    pages = {560},
    year = {1981},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_23082.shtml},
}