@article{PismaZhETF.14.140,
    title = {Possible Connection Between the Amplitudes of the Processes $e^+e^- \to 3\pi$, $\gamma \gamma \to 3\pi$, and $\pi^0\to 2\gamma$},
    author = {Terent'ev, M. V.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {14},
    issue = {2},
    pages = {140},
    year = {1971},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_24570.shtml},
}