@article{PismaZhETF.29.716,
    title = {Coulomb interaction in thin semiconductor and semimetal films},
    author = {Keldysh, L. V.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {29},
    issue = {11},
    pages = {716},
    year = {1979},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_22207.shtml},
}