@article{PismaZhETF.14.545,
    title = {Possibility of Producing Tunable Infrared Gas Lasers},
    author = {Basov, N. G. and Belenov, E. M. and Danilychev, V. A. and Suchkov, A. F.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {14},
    issue = {10},
    pages = {545},
    year = {1971},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_24974.shtml},
}