@article{PismaZhETF.14.494,
    title = {Dielectric - Metal Transition in the System of Excitons in Germanium},
    author = {Asnin, V. M. and Rogachev, A. A.},
    journal = {Письма в ЖЭТФ},
    volume = {14},
    issue = {9},
    pages = {494},
    year = {1971},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_24943.shtml},
}