@article{PismaZhETF.44.39,
    title = {Spectra of shallow donors in multivalley semiconductors},
    author = {Beinikhes, I. L. and Kogan, Sh. M.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {44},
    issue = {1},
    pages = {39},
    year = {1986},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_20804.shtml},
}