@article{PismaZhETF.13.628,
    title = {Near-threshold Singularities of the Yield of Direct Photonuclear Reactions},
    author = {Ratner, B. S.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {13},
    issue = {11},
    pages = {628},
    year = {1971},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_24358.shtml},
}