@article{PismaZhETF.45.436,
    title = {2D electron-hole condensate at a germanium surface},
    author = {Asnin, V. M. and Rogachev, A. A. and Stepanov, V. I. and Churilov, A. B.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {45},
    issue = {9},
    pages = {436},
    year = {1987},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_18817.shtml},
}