@article{PismaZhETF.16.428,
    title = {Narrow Resonances of Laser-induced $\gamma$-ray Emission and Absorption by Nuclei},
    author = {Letokhov, V. S.},
    journal = {Письма в ЖЭТФ},
    volume = {16},
    issue = {7},
    pages = {428},
    year = {1972},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_26923.shtml},
}