@article{PismaZhETF.59.770,
    title = {Bloch oscillations and dynamic conductivity of a superlattice},
    author = {Kopaev, Yu. V. and Molotkov, S. N.},
    journal = {Письма в ЖЭТФ},
    volume = {59},
    issue = {11},
    pages = {770},
    year = {1994},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_19919.shtml},
}