@article{PismaZhETF.23.123,
    title = {Contribution of two-photon mechanism to the real part of the $K_L \to \mu\bar{\mu}$ decay amplitude and estimates of the masses of charmed particles},
    author = {Voloshin, M. B. and Shabalin, E. P.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {23},
    issue = {2},
    pages = {123},
    year = {1976},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_27441.shtml},
}