@article{PismaZhETF.54.266,
    title = {Theory of self-induced transparency in a focused light beam},
    author = {Kozlov, V. V. and Fradkin, E. E.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {54},
    issue = {5},
    pages = {266},
    year = {1991},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_18877.shtml},
}