@article{PismaZhETF.41.514,
    title = {Population inversion in sublevels of n = 1 excitons of the $Cu_2O$ yellow series in a magnetic field},
    author = {Kreingol'd, F. I. and Lider, K. F.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {41},
    issue = {12},
    pages = {514},
    year = {1985},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_22419.shtml},
}