@article{PismaZhETF.18.504,
    title = {Interference states of optical excitons. Observation of additional waves},
    author = {Kiselev, V. A. and Razbirin, B. S. and Ural'tsev, I. N.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {18},
    issue = {8},
    pages = {504},
    year = {1973},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_24031.shtml},
}