@article{PismaZhETF.51.225,
    title = {Electromagnetic properties of ceramic high-$T_c$ superconductor in critical state},
    author = {Voloshin, I. F. and Makarov, N. M. and Fisher, L. M. and Yampol'skii, V. A.},
    journal = {Письма в ЖЭТФ},
    volume = {51},
    issue = {4},
    pages = {225},
    year = {1990},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_17234.shtml},
}