@article{PismaZhETF.62.188,
    title = {On the four-photon decay of the neutral pion},
    author = {Bratkovskaya, E. L. and Kuraev, ε. α. and Silagadze, Z. K.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {62},
    issue = {3},
    pages = {188},
    year = {1995},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_14354.shtml},
}