@article{PismaZhETF.4.36,
    title = {Production of Electron-positron Pairs by High-energy Gamma Quanta},
    author = {Bern, J. and Grishin, V. G. and Kistenev, E. P.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {4},
    issue = {1},
    pages = {36},
    year = {1966},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_24820.shtml},
}