@article{PismaZhETF.57.99,
    title = {Superradiance of two-component media},
    author = {Andreev, A. V. and Polevoi, P. V.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {57},
    issue = {2},
    pages = {99},
    year = {1993},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_17742.shtml},
}