@article{PismaZhETF.29.525,
    title = {Anisotropic spin-spin interaction of $Dy^{3+}$ ion pairs associated with a color center in crystal $CaF_2$},
    author = {Kazanskii, S. A.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {29},
    issue = {9},
    pages = {525},
    year = {1979},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_22138.shtml},
}