@article{PismaZhETF.8.525,
    title = {Measurement of Natural Line Width of the Emission of a Gas Laser with Coupled Modes},
    author = {Egorov, Yu. P.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {8},
    issue = {10},
    pages = {525},
    year = {1968},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_26405.shtml},
}