@article{PismaZhETF.19.182,
    title = {Dynamic negative differential conductivity (NDC) in homogeneous and electrically-stable semiconductors},
    author = {Zil'berman, P. E.},
    journal = {Письма в ЖЭТФ},
    volume = {19},
    issue = {3},
    pages = {182},
    year = {1974},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_26978.shtml},
}