@article{PismaZhETF.48.605,
    title = {Optical properties of thin $YBa_2Cu_3O_7$ films in the IR region},
    author = {Konstantinov, V. L and Stark, S. Yu. and Tsidil'kovskii, I. M.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {48},
    issue = {11},
    pages = {605},
    year = {1988},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_16805.shtml},
}