@article{PismaZhETF.8.309,
    title = {High-power Single-mode Ruby Laser},
    author = {Korneev, N. E. and Pavlov, Yu. I.},
    journal = {Письма в ЖЭТФ},
    volume = {8},
    issue = {6},
    pages = {309},
    year = {1968},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_26002.shtml},
}