@article{PismaZhETF.4.418,
    title = {Excitons in $Ag_2O$ Crystals},
    author = {Gross, E. F. and Kreingol'd, F. I.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {4},
    issue = {10},
    pages = {418},
    year = {1966},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_25055.shtml},
}