@article{PismaZhETF.20.27,
    title = {Use of the anomalous passage effect to obtain stimulated emission of $\gamma$ quanta in a crystal},
    author = {Kagan, Yu.},
    journal = {Письма в ЖЭТФ},
    volume = {20},
    issue = {1},
    pages = {27},
    year = {1974},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_27177.shtml},
}