@article{PismaZhETF.14.452,
    title = {New Experiments on the Formation of a Self-focusing Filament from the Focus of the Beam on the Surface of a Medium},
    author = {Askar'yan, G. A. and Diyanov, Kh. A. and Mukhamadzhanov, M.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {14},
    issue = {8},
    pages = {452},
    year = {1971},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_24931.shtml},
}