@article{PismaZhETF.15.383,
    title = {Resonant Interaction Between Ortho- and Para-excitons with Participation of Phonons in a $Cu_2O$ Crystal},
    author = {Gross, E. F. and Kreingol'd, F. I. and Makarov, V. L.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {15},
    issue = {7},
    pages = {383},
    year = {1972},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_26597.shtml},
}