@article{PismaZhETF.2.27,
    title = {Step/wise Excitation of Fluorescence of $CaWo_4$ Activated with $Er^{3+}$},
    author = {Bakumenko, V. L. and Vlasov, A. N. and Kovarskaya, E. S. and Kozina, G. S. and Favorin, V. N.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {2},
    issue = {1},
    pages = {27},
    year = {1965},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_24449.shtml},
}