@article{PismaZhETF.4.241,
    title = {Electron Focusing in Thin Single-crystal Copper Films},
    author = {Grachev, B. D. and Komar, A. P. and Korobochko, Yu. S. and Mineev, V. I.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {4},
    issue = {7},
    pages = {241},
    year = {1966},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_24996.shtml},
}