@article{PismaZhETF.35.457,
    title = {Local biphonon in an $NH_4Br$ crystal},
    author = {Belousov, M. V. and Vol'f, B. E. and Ivanova, E. A. and Pogarev, D. E.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {35},
    issue = {11},
    pages = {457},
    year = {1982},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_20051.shtml},
}