@article{PismaZhETF.54.75,
    title = {How rare are the decays $Z\to \gamma J/\Psi$ and $Z\to\gamma\Upsilon$ (1S)?},
    author = {Achasov, N. N.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {54},
    issue = {2},
    pages = {75},
    year = {1991},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_18088.shtml},
}