@article{PismaZhETF.20.217,
    title = {$N\bar{N}$ interaction and separation of matter and antimatter in the universe},
    author = {Bogdanova, L. N. and Shapiro, I. S.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {20},
    issue = {3},
    pages = {217},
    year = {1974},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_27233.shtml},
}