@article{PismaZhETF.68.359,
    title = {Coherent effects in ultrashort pulse propagation through optically thick three-level medium},
    author = {Kozlov, V. V. and Fradkin, E. E.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {68},
    issue = {5},
    pages = {359},
    year = {1998},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_14725.shtml},
}