@article{PismaZhETF.10.367,
    title = {YAG:$Nd^{3+}$ Laser with Emission Spectrum Width Less than $10^{-9} \AA$},
    author = {Vinokurov, G. N. and Galaktionova, N. N. and Egorova, V. F. and Mak, A. A.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {10},
    issue = {8},
    pages = {367},
    year = {1969},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_25746.shtml},
}