@article{PismaZhETF.6.642,
    title = {Investigation of Self-focusing of Neodymium-laser Radiation},
    author = {Korobkin, V. V. and Serov, R. V.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {6},
    issue = {5},
    pages = {642},
    year = {1967},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_25443.shtml},
}