@article{PismaZhETF.39.354,
    title = {Tunneling in glasses and anomalous low-temperature broadening of impurity optical lines},
    author = {Osad'ko, I. S.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {39},
    issue = {8},
    pages = {354},
    year = {1984},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_19636.shtml},
}