@article{PismaZhETF.42.17,
    title = {Photopositronium in the magnetosphere of a pulsar},
    author = {Usov, V. V. and Shabad, A. E.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {42},
    issue = {1},
    pages = {17},
    year = {1985},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_21524.shtml},
}