@article{PismaZhETF.13.170,
    title = {Concerning the Nature of the Nonlinearity of the NaCl Crystal},
    author = {Brodin, M. S. and Kamuz, A. M.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {13},
    issue = {3},
    pages = {170},
    year = {1971},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_23996.shtml},
}