@article{PismaZhETF.12.286,
    title = {Increase of Radiation Brightness in a Brillouin Laser},
    author = {Grasyuk, A. I. and Popovichev, V. I. and Ragul'skii, V. V. and Faizullov, F. S.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {12},
    issue = {6},
    pages = {286},
    year = {1970},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_26280.shtml},
}