@article{PismaZhETF.58.722,
    title = {Ellipsometric measurement of the superconducting transition in a $YBa_2Cu_3O_{7-\delta}$ ab-oriented film at a wavelength of 119 $\mu$ m},
    author = {Sushkov, A. B. and Shulga, S. V. and Tishchenko, E. A.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {58},
    issue = {9},
    pages = {722},
    year = {1993},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_17997.shtml},
}