@article{PismaZhETF.2.473,
    title = {Effect of Hard Radiation on the Optical Centers of $TR^{3+}$ Ions in Crystals},
    author = {Voron'ko, Yu. K. and Kaminskii, A. A. and Osiko, V. V.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {2},
    issue = {10},
    pages = {473},
    year = {1965},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_24646.shtml},
}