@article{PismaZhETF.30.546,
    title = {New approach to radiative transitions in charmonium},
    author = {Shifman, M. A.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {30},
    issue = {8},
    pages = {546},
    year = {1979},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_20691.shtml},
}