@article{PismaZhETF.13.682,
    title = {Singlet and Triplet Exciton-Impurity States in Semiconductors},
    author = {Gorban', I. S. and Gubanov, V. A. and Krokhmal', A. P.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {13},
    issue = {12},
    pages = {682},
    year = {1971},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_24372.shtml},
}