@article{PismaZhETF.19.233,
    title = {Neutral weak currents?},
    author = {Pontecorvo, B.},
    journal = {Письма в ЖЭТФ},
    volume = {19},
    issue = {4},
    pages = {233},
    year = {1974},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_27043.shtml},
}