@article{PismaZhETF.30.585,
    title = {Amplifications of far infrared radiation in germanium during the population inversion of "hot" holes},
    author = {Andronov, A. A. and Kozlov, V. A. and Mazov, L. S. and Shastin, V. N.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {30},
    issue = {9},
    pages = {585},
    year = {1979},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_20701.shtml},
}