@article{PismaZhETF.30.36,
    title = {Uniform deformation and birefringence of crystals in a nonuniform electric field},
    author = {Rokos, I. A. and Rokosova, L. A. and Kirikov, V. A. and Gladkii, V. V.},
    journal = {Письма в ЖЭТФ},
    volume = {30},
    issue = {1},
    pages = {36},
    year = {1979},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_20576.shtml},
}