@article{PismaZhETF.88.88,
    title = {Electroproduction of electron-positron pair in a medium},
    author = {Baier, V. N. and Katkov, V. M.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {88},
    issue = {2},
    pages = {88},
    year = {2008},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_28145.shtml},
}