@article{PismaZhETF.48.581,
    title = {Coherent amplification of an ultrashort pulse in a three-level medium without a population inversion},
    author = {Kocharovskaya, O. A. and Khanin, Ya. I.},
    journal = {Письма в ЖЭТФ},
    volume = {48},
    issue = {11},
    pages = {581},
    year = {1988},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_16799.shtml},
}