@article{PismaZhETF.1.54,
    title = {Observation of focused electron beams in a metal},
    author = {Sharvin, Yu. V. and Fisher, L. M.},
    journal = {Письма в ЖЭТФ},
    volume = {1},
    issue = {5},
    pages = {54},
    year = {1965},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_24432.shtml},
}