@article{PismaZhETF.26.412,
    title = {Pontecorvo oscillations and searches for the $\tau$ lepton in neutrino experiments},
    author = {Lipmanov, E. M. and Mikheev, N. V.},
    journal = {Письма в ЖЭТФ},
    volume = {26},
    issue = {5},
    pages = {412},
    year = {1977},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_20912.shtml},
}