@article{PismaZhETF.29.239,
    title = {Investigation of inversion of the energy levels of the $Tb^{3+}$ ion in an iron garnet in strong fields using the Faraday effect},
    author = {Valiev, U. V. and Krinchik, G. S. and Levitin, R. Z. and Mukimov, K. M.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {29},
    issue = {4},
    pages = {239},
    year = {1979},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_22065.shtml},
}