@article{PismaZhETF.29.475,
    title = {Complex spectrum of exciton-impurity complexes in imperfect crystals of  tin dioxide},
    author = {Agekyan, V. T.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {29},
    issue = {8},
    pages = {475},
    year = {1979},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_22125.shtml},
}