@article{PismaZhETF.13.286,
    title = {Possibility of Producing Inverted Population in Atomic Beams by Charge Exchange of Protons with Atoms},
    author = {Presnyakov, L. P. and Shevel'ko, V. P.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {13},
    issue = {6},
    pages = {286},
    year = {1971},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_24083.shtml},
}