@article{PismaZhETF.55.574,
    title = {Variable valence and ESR of yttrium ceramics},
    author = {Kosov, A. A.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {55},
    issue = {10},
    pages = {574},
    year = {1992},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_19314.shtml},
}