@article{PismaZhETF.50.222,
    title = {Ultra-low-background apparatus with germanium shielding},
    author = {Popeko, L. A. and Lerbin, A. V. and Chernyi, A. V. and Bakhlanov, S. V. and Muratova, V. N. and Shishkina, G. A. and Klapdor, H. V.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {50},
    issue = {5},
    pages = {222},
    year = {1989},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_17091.shtml},
}