@article{PismaZhETF.4.400,
    title = {Self-focusing of a Light Beam upon Excitation of the Atoms and Molecules of the Medium in the Beam},
    author = {Askar'yan, G. A.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {4},
    issue = {10},
    pages = {400},
    year = {1966},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_25049.shtml},
}