@article{PismaZhETF.28.156,
    title = {Conservation of electric charge},
    author = {Voloshin, M. B. and Okun', L. B.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {28},
    issue = {3},
    pages = {156},
    year = {1978},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_24111.shtml},
}