@article{PismaZhETF.5.391,
    title = {Self-focusing of Laser Beams in Ruby and Leucosapphire Crystals},
    author = {Zverev, G. M. and Mikhailova, T. N. and Pashkov, V. A. and Solov'eva, V. M.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {5},
    issue = {11},
    pages = {391},
    year = {1967},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_25208.shtml},
}