@article{PismaZhETF.1.3,
    title = {Investigation of stimulated emission of $Ca_2Nd^{3+}$ (type II) crystals at room temperature},
    author = {Voron'ko, Yu. K. and Kaminskii, A. A. and Kornienko, L. S. and Osiko, V. V. and Prokhorov, A. M. and Udovenchik, V. T.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {1},
    issue = {2},
    pages = {3},
    year = {1965},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_24390.shtml},
}