@article{PismaZhETF.14.253,
    title = {Biexciton in $Cu_2O$ Crystal},
    author = {L'vov, O. I. and Pavinskii, P. P.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {14},
    issue = {4},
    pages = {253},
    year = {1971},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_24602.shtml},
}