@article{PismaZhETF.25.197,
    title = {Density of states in a one-dimensional semiconductor with narrow forbidden band in the presence of impurities},
    author = {Ovchinnikov, A. A. and Erikhman, N. S.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {25},
    issue = {4},
    pages = {197},
    year = {1977},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_21110.shtml},
}