@article{PismaZhETF.12.98,
    title = {Biexcitoh in $Cu_2O$ Crystal},
    author = {Gross, E. F. and Kreingold, F. I.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {12},
    issue = {2},
    pages = {98},
    year = {1970},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_26242.shtml},
}