@article{PismaZhETF.16.592,
    title = {Submillimeter-band Gas Laser Pumped by a $CO_2$ Laser},
    author = {Dyubko, S. F. and Svich, V. A. and Fesenko, L. D.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {16},
    issue = {11},
    pages = {592},
    year = {1972},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_26855.shtml},
}