@article{PismaZhETF.13.383,
    title = {Determination of  the Mass of the Muonic Neutrino in Radiative Pion Decays},
    author = {Bardin, D. Yu. and Mitsel'makher, S. V. and Shumeiko, N. M.},
    journal = {Письма в ЖЭТФ},
    volume = {13},
    issue = {7},
    pages = {383},
    year = {1971},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_24276.shtml},
}