@article{PismaZhETF.4.471,
    title = {Cooperative Sensitization of Luminescence in Crystals Activated with Rare Earth Ions},
    author = {Ovsyakin, V. V. and Feofilof, P. P.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {4},
    issue = {11},
    pages = {471},
    year = {1966},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_25070.shtml},
}