@article{PismaZhETF.61.781,
    title = {Optical quenching of coherence of states induced in optical  transitions; saturation of the four-wave-mixing signal},
    author = {Neporent, B. S.},
    journal = {Письма в ЖЭТФ},
    volume = {61},
    issue = {10},
    pages = {781},
    year = {1995},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_18269.shtml},
}