@article{PismaZhETF.15.738,
    title = {Local Oscillations in an Anharmonic Crystal},
    author = {Zavt, G. S. and Reifman, S. P.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {15},
    issue = {12},
    pages = {738},
    year = {1972},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_26707.shtml},
}