@article{PismaZhETF.47.321,
    title = {Optical study of $YBa_2Cu_3O_{7-x}$, thin films by means of synchrotron radiation in the region 4-30 eV},
    author = {Stankevich, V. G. and Svechnikov, N. Yu. and Kaznacheev, K. V. and Kink, R. A. and Niedrais, Kh. E. and Golubev, V. N. and Kosyev, V. Ya. and Simirskii, Yu. N. and Tsetlin, M. B.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {47},
    issue = {6},
    pages = {321},
    year = {1988},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_16517.shtml},
}