@article{PismaZhETF.9.100,
    title = {Single-frequency Ruby Laser with Active Q-switch},
    author = {Bondarenko, A. N. and Krivoshchekov, G. V. and Smirnov, V. A},
    journal = {Письма в ЖЭТФ},
    volume = {9},
    issue = {2},
    pages = {100},
    year = {1969},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_25283.shtml},
}