@article{PismaZhETF.6.567,
    title = {Submillimeter CW Gas Laser},
    author = {Dyubko, S. F. and Svich, V. A. and Valitov, R. A.},
    journal = {Письма в ЖЭТФ},
    volume = {6},
    issue = {3},
    pages = {567},
    year = {1967},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_25268.shtml},
}