@article{PismaZhETF.7.35,
    title = {Formation of Ultrasound Pulses of Coherent Light},
    author = {Letokhov, V. S.},
    journal = {Письма в ЖЭТФ},
    volume = {7},
    issue = {1},
    pages = {35},
    year = {1968},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_25568.shtml},
}