@article{PismaZhETF.35.530,
    title = {Conversion of an atomic electron into a positron and double $\beta^+$ decay},
    author = {Voloshin, M. B. and Mitsel'makher, G. V. and Eramzhyan, R. A.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {35},
    issue = {12},
    pages = {530},
    year = {1982},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_20078.shtml},
}